Linux patch 4.14.1104.14-118

Signed-off-by: Mike Pagano <mpagano@gentoo.org>

2 files changed, 3413 insertions, 0 deletions

diff --git a/0000_README b/0000_README
index 4a5cbb0b..a696c1c1 100644
--- a/0000_README
+++ b/0000_README
@@ -479,6 +479,10 @@ Patch:  1108_4.14.109.patch
 From:   http://www.kernel.org
 Desc:   Linux 4.14.109
 
+Patch:  1109_4.14.110.patch
+From:   http://www.kernel.org
+Desc:   Linux 4.14.110
+
 Patch:  1500_XATTR_USER_PREFIX.patch
 From:   https://bugs.gentoo.org/show_bug.cgi?id=470644
 Desc:   Support for namespace user.pax.* on tmpfs.
diff --git a/1109_linux-4.14.110.patch b/1109_linux-4.14.110.patch
new file mode 100644
index 00000000..34378efd
--- /dev/null
+++ b/1109_linux-4.14.110.patch
@@ -0,0 +1,3409 @@
+diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
+index 5d12166bd66b..f67ed33d1054 100644
+--- a/Documentation/virtual/kvm/api.txt
++++ b/Documentation/virtual/kvm/api.txt
+@@ -13,7 +13,7 @@ of a virtual machine.  The ioctls belong to three classes
+ 
+  - VM ioctls: These query and set attributes that affect an entire virtual
+    machine, for example memory layout.  In addition a VM ioctl is used to
+-   create virtual cpus (vcpus).
++   create virtual cpus (vcpus) and devices.
+ 
+    Only run VM ioctls from the same process (address space) that was used
+    to create the VM.
+@@ -24,6 +24,11 @@ of a virtual machine.  The ioctls belong to three classes
+    Only run vcpu ioctls from the same thread that was used to create the
+    vcpu.
+ 
++ - device ioctls: These query and set attributes that control the operation
++   of a single device.
++
++   device ioctls must be issued from the same process (address space) that
++   was used to create the VM.
+ 
+ 2. File descriptors
+ -------------------
+@@ -32,10 +37,11 @@ The kvm API is centered around file descriptors.  An initial
+ open("/dev/kvm") obtains a handle to the kvm subsystem; this handle
+ can be used to issue system ioctls.  A KVM_CREATE_VM ioctl on this
+ handle will create a VM file descriptor which can be used to issue VM
+-ioctls.  A KVM_CREATE_VCPU ioctl on a VM fd will create a virtual cpu
+-and return a file descriptor pointing to it.  Finally, ioctls on a vcpu
+-fd can be used to control the vcpu, including the important task of
+-actually running guest code.
++ioctls.  A KVM_CREATE_VCPU or KVM_CREATE_DEVICE ioctl on a VM fd will
++create a virtual cpu or device and return a file descriptor pointing to
++the new resource.  Finally, ioctls on a vcpu or device fd can be used
++to control the vcpu or device.  For vcpus, this includes the important
++task of actually running guest code.
+ 
+ In general file descriptors can be migrated among processes by means
+ of fork() and the SCM_RIGHTS facility of unix domain socket.  These
+diff --git a/Makefile b/Makefile
+index e02bced59a57..37bd0b40876d 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,7 +1,7 @@
+ # SPDX-License-Identifier: GPL-2.0
+ VERSION = 4
+ PATCHLEVEL = 14
+-SUBLEVEL = 109
++SUBLEVEL = 110
+ EXTRAVERSION =
+ NAME = Petit Gorille
+ 
+diff --git a/arch/arm/mach-imx/cpuidle-imx6q.c b/arch/arm/mach-imx/cpuidle-imx6q.c
+index bfeb25aaf9a2..326e870d7123 100644
+--- a/arch/arm/mach-imx/cpuidle-imx6q.c
++++ b/arch/arm/mach-imx/cpuidle-imx6q.c
+@@ -16,30 +16,23 @@
+ #include "cpuidle.h"
+ #include "hardware.h"
+ 
+-static atomic_t master = ATOMIC_INIT(0);
+-static DEFINE_SPINLOCK(master_lock);
++static int num_idle_cpus = 0;
++static DEFINE_SPINLOCK(cpuidle_lock);
+ 
+ static int imx6q_enter_wait(struct cpuidle_device *dev,
+ 			    struct cpuidle_driver *drv, int index)
+ {
+-	if (atomic_inc_return(&master) == num_online_cpus()) {
+-		/*
+-		 * With this lock, we prevent other cpu to exit and enter
+-		 * this function again and become the master.
+-		 */
+-		if (!spin_trylock(&master_lock))
+-			goto idle;
++	spin_lock(&cpuidle_lock);
++	if (++num_idle_cpus == num_online_cpus())
+ 		imx6_set_lpm(WAIT_UNCLOCKED);
+-		cpu_do_idle();
+-		imx6_set_lpm(WAIT_CLOCKED);
+-		spin_unlock(&master_lock);
+-		goto done;
+-	}
++	spin_unlock(&cpuidle_lock);
+ 
+-idle:
+ 	cpu_do_idle();
+-done:
+-	atomic_dec(&master);
++
++	spin_lock(&cpuidle_lock);
++	if (num_idle_cpus-- == num_online_cpus())
++		imx6_set_lpm(WAIT_CLOCKED);
++	spin_unlock(&cpuidle_lock);
+ 
+ 	return index;
+ }
+diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
+index fe418226df7f..de3b07c7be30 100644
+--- a/arch/powerpc/Kconfig
++++ b/arch/powerpc/Kconfig
+@@ -164,7 +164,7 @@ config PPC
+ 	select GENERIC_CLOCKEVENTS_BROADCAST	if SMP
+ 	select GENERIC_CMOS_UPDATE
+ 	select GENERIC_CPU_AUTOPROBE
+-	select GENERIC_CPU_VULNERABILITIES	if PPC_BOOK3S_64
++	select GENERIC_CPU_VULNERABILITIES	if PPC_BARRIER_NOSPEC
+ 	select GENERIC_IRQ_SHOW
+ 	select GENERIC_IRQ_SHOW_LEVEL
+ 	select GENERIC_SMP_IDLE_THREAD
+@@ -236,6 +236,11 @@ config PPC
+ 	# Please keep this list sorted alphabetically.
+ 	#
+ 
++config PPC_BARRIER_NOSPEC
++    bool
++    default y
++    depends on PPC_BOOK3S_64 || PPC_FSL_BOOK3E
++
+ config GENERIC_CSUM
+ 	def_bool n
+ 
+diff --git a/arch/powerpc/include/asm/asm-prototypes.h b/arch/powerpc/include/asm/asm-prototypes.h
+index 7330150bfe34..ba4c75062d49 100644
+--- a/arch/powerpc/include/asm/asm-prototypes.h
++++ b/arch/powerpc/include/asm/asm-prototypes.h
+@@ -126,4 +126,10 @@ extern int __ucmpdi2(u64, u64);
+ void _mcount(void);
+ unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip);
+ 
++/* Patch sites */
++extern s32 patch__call_flush_count_cache;
++extern s32 patch__flush_count_cache_return;
++
++extern long flush_count_cache;
++
+ #endif /* _ASM_POWERPC_ASM_PROTOTYPES_H */
+diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h
+index e582d2c88092..449474f667c4 100644
+--- a/arch/powerpc/include/asm/barrier.h
++++ b/arch/powerpc/include/asm/barrier.h
+@@ -77,19 +77,25 @@ do {									\
+ })
+ 
+ #ifdef CONFIG_PPC_BOOK3S_64
++#define NOSPEC_BARRIER_SLOT   nop
++#elif defined(CONFIG_PPC_FSL_BOOK3E)
++#define NOSPEC_BARRIER_SLOT   nop; nop
++#endif
++
++#ifdef CONFIG_PPC_BARRIER_NOSPEC
+ /*
+  * Prevent execution of subsequent instructions until preceding branches have
+  * been fully resolved and are no longer executing speculatively.
+  */
+-#define barrier_nospec_asm ori 31,31,0
++#define barrier_nospec_asm NOSPEC_BARRIER_FIXUP_SECTION; NOSPEC_BARRIER_SLOT
+ 
+ // This also acts as a compiler barrier due to the memory clobber.
+ #define barrier_nospec() asm (stringify_in_c(barrier_nospec_asm) ::: "memory")
+ 
+-#else /* !CONFIG_PPC_BOOK3S_64 */
++#else /* !CONFIG_PPC_BARRIER_NOSPEC */
+ #define barrier_nospec_asm
+ #define barrier_nospec()
+-#endif
++#endif /* CONFIG_PPC_BARRIER_NOSPEC */
+ 
+ #include <asm-generic/barrier.h>
+ 
+diff --git a/arch/powerpc/include/asm/code-patching-asm.h b/arch/powerpc/include/asm/code-patching-asm.h
+new file mode 100644
+index 000000000000..ed7b1448493a
+--- /dev/null
++++ b/arch/powerpc/include/asm/code-patching-asm.h
+@@ -0,0 +1,18 @@
++/* SPDX-License-Identifier: GPL-2.0+ */
++/*
++ * Copyright 2018, Michael Ellerman, IBM Corporation.
++ */
++#ifndef _ASM_POWERPC_CODE_PATCHING_ASM_H
++#define _ASM_POWERPC_CODE_PATCHING_ASM_H
++
++/* Define a "site" that can be patched */
++.macro patch_site label name
++	.pushsection ".rodata"
++	.balign 4
++	.global \name
++\name:
++	.4byte	\label - .
++	.popsection
++.endm
++
++#endif /* _ASM_POWERPC_CODE_PATCHING_ASM_H */
+diff --git a/arch/powerpc/include/asm/code-patching.h b/arch/powerpc/include/asm/code-patching.h
+index 812535f40124..b2051234ada8 100644
+--- a/arch/powerpc/include/asm/code-patching.h
++++ b/arch/powerpc/include/asm/code-patching.h
+@@ -32,6 +32,8 @@ unsigned int create_cond_branch(const unsigned int *addr,
+ int patch_branch(unsigned int *addr, unsigned long target, int flags);
+ int patch_instruction(unsigned int *addr, unsigned int instr);
+ int raw_patch_instruction(unsigned int *addr, unsigned int instr);
++int patch_instruction_site(s32 *addr, unsigned int instr);
++int patch_branch_site(s32 *site, unsigned long target, int flags);
+ 
+ int instr_is_relative_branch(unsigned int instr);
+ int instr_is_relative_link_branch(unsigned int instr);
+diff --git a/arch/powerpc/include/asm/feature-fixups.h b/arch/powerpc/include/asm/feature-fixups.h
+index a9b64df34e2a..b1d478acbaec 100644
+--- a/arch/powerpc/include/asm/feature-fixups.h
++++ b/arch/powerpc/include/asm/feature-fixups.h
+@@ -211,6 +211,25 @@ label##3:					       	\
+ 	FTR_ENTRY_OFFSET 951b-952b;			\
+ 	.popsection;
+ 
++#define NOSPEC_BARRIER_FIXUP_SECTION			\
++953:							\
++	.pushsection __barrier_nospec_fixup,"a";	\
++	.align 2;					\
++954:							\
++	FTR_ENTRY_OFFSET 953b-954b;			\
++	.popsection;
++
++#define START_BTB_FLUSH_SECTION			\
++955:							\
++
++#define END_BTB_FLUSH_SECTION			\
++956:							\
++	.pushsection __btb_flush_fixup,"a";	\
++	.align 2;							\
++957:						\
++	FTR_ENTRY_OFFSET 955b-957b;			\
++	FTR_ENTRY_OFFSET 956b-957b;			\
++	.popsection;
+ 
+ #ifndef __ASSEMBLY__
+ #include <linux/types.h>
+@@ -219,6 +238,8 @@ extern long stf_barrier_fallback;
+ extern long __start___stf_entry_barrier_fixup, __stop___stf_entry_barrier_fixup;
+ extern long __start___stf_exit_barrier_fixup, __stop___stf_exit_barrier_fixup;
+ extern long __start___rfi_flush_fixup, __stop___rfi_flush_fixup;
++extern long __start___barrier_nospec_fixup, __stop___barrier_nospec_fixup;
++extern long __start__btb_flush_fixup, __stop__btb_flush_fixup;
+ 
+ void apply_feature_fixups(void);
+ void setup_feature_keys(void);
+diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
+index 5a740feb7bd7..15cef59092c7 100644
+--- a/arch/powerpc/include/asm/hvcall.h
++++ b/arch/powerpc/include/asm/hvcall.h
+@@ -340,10 +340,12 @@
+ #define H_CPU_CHAR_BRANCH_HINTS_HONORED	(1ull << 58) // IBM bit 5
+ #define H_CPU_CHAR_THREAD_RECONFIG_CTRL	(1ull << 57) // IBM bit 6
+ #define H_CPU_CHAR_COUNT_CACHE_DISABLED	(1ull << 56) // IBM bit 7
++#define H_CPU_CHAR_BCCTR_FLUSH_ASSIST	(1ull << 54) // IBM bit 9
+ 
+ #define H_CPU_BEHAV_FAVOUR_SECURITY	(1ull << 63) // IBM bit 0
+ #define H_CPU_BEHAV_L1D_FLUSH_PR	(1ull << 62) // IBM bit 1
+ #define H_CPU_BEHAV_BNDS_CHK_SPEC_BAR	(1ull << 61) // IBM bit 2
++#define H_CPU_BEHAV_FLUSH_COUNT_CACHE	(1ull << 58) // IBM bit 5
+ 
+ /* Flag values used in H_REGISTER_PROC_TBL hcall */
+ #define PROC_TABLE_OP_MASK	0x18
+diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h
+index ce0930d68857..b991bd31b383 100644
+--- a/arch/powerpc/include/asm/ppc-opcode.h
++++ b/arch/powerpc/include/asm/ppc-opcode.h
+@@ -288,6 +288,7 @@
+ /* Misc instructions for BPF compiler */
+ #define PPC_INST_LBZ			0x88000000
+ #define PPC_INST_LD			0xe8000000
++#define PPC_INST_LDX			0x7c00002a
+ #define PPC_INST_LHZ			0xa0000000
+ #define PPC_INST_LWZ			0x80000000
+ #define PPC_INST_LHBRX			0x7c00062c
+@@ -295,6 +296,7 @@
+ #define PPC_INST_STB			0x98000000
+ #define PPC_INST_STH			0xb0000000
+ #define PPC_INST_STD			0xf8000000
++#define PPC_INST_STDX			0x7c00012a
+ #define PPC_INST_STDU			0xf8000001
+ #define PPC_INST_STW			0x90000000
+ #define PPC_INST_STWU			0x94000000
+diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
+index 36f3e41c9fbe..3e1b8de72776 100644
+--- a/arch/powerpc/include/asm/ppc_asm.h
++++ b/arch/powerpc/include/asm/ppc_asm.h
+@@ -802,4 +802,14 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601)
+ 	stringify_in_c(.long (_target) - . ;)	\
+ 	stringify_in_c(.previous)
+ 
++#ifdef CONFIG_PPC_FSL_BOOK3E
++#define BTB_FLUSH(reg)			\
++	lis reg,BUCSR_INIT@h;		\
++	ori reg,reg,BUCSR_INIT@l;	\
++	mtspr SPRN_BUCSR,reg;		\
++	isync;
++#else
++#define BTB_FLUSH(reg)
++#endif /* CONFIG_PPC_FSL_BOOK3E */
++
+ #endif /* _ASM_POWERPC_PPC_ASM_H */
+diff --git a/arch/powerpc/include/asm/security_features.h b/arch/powerpc/include/asm/security_features.h
+index 44989b22383c..759597bf0fd8 100644
+--- a/arch/powerpc/include/asm/security_features.h
++++ b/arch/powerpc/include/asm/security_features.h
+@@ -22,6 +22,7 @@ enum stf_barrier_type {
+ 
+ void setup_stf_barrier(void);
+ void do_stf_barrier_fixups(enum stf_barrier_type types);
++void setup_count_cache_flush(void);
+ 
+ static inline void security_ftr_set(unsigned long feature)
+ {
+@@ -59,6 +60,9 @@ static inline bool security_ftr_enabled(unsigned long feature)
+ // Indirect branch prediction cache disabled
+ #define SEC_FTR_COUNT_CACHE_DISABLED	0x0000000000000020ull
+ 
++// bcctr 2,0,0 triggers a hardware assisted count cache flush
++#define SEC_FTR_BCCTR_FLUSH_ASSIST	0x0000000000000800ull
++
+ 
+ // Features indicating need for Spectre/Meltdown mitigations
+ 
+@@ -74,6 +78,9 @@ static inline bool security_ftr_enabled(unsigned long feature)
+ // Firmware configuration indicates user favours security over performance
+ #define SEC_FTR_FAVOUR_SECURITY		0x0000000000000200ull
+ 
++// Software required to flush count cache on context switch
++#define SEC_FTR_FLUSH_COUNT_CACHE	0x0000000000000400ull
++
+ 
+ // Features enabled by default
+ #define SEC_FTR_DEFAULT \
+diff --git a/arch/powerpc/include/asm/setup.h b/arch/powerpc/include/asm/setup.h
+index a5e919e34c42..5ceab440ecb9 100644
+--- a/arch/powerpc/include/asm/setup.h
++++ b/arch/powerpc/include/asm/setup.h
+@@ -52,6 +52,26 @@ enum l1d_flush_type {
+ 
+ void setup_rfi_flush(enum l1d_flush_type, bool enable);
+ void do_rfi_flush_fixups(enum l1d_flush_type types);
++#ifdef CONFIG_PPC_BARRIER_NOSPEC
++void setup_barrier_nospec(void);
++#else
++static inline void setup_barrier_nospec(void) { };
++#endif
++void do_barrier_nospec_fixups(bool enable);
++extern bool barrier_nospec_enabled;
++
++#ifdef CONFIG_PPC_BARRIER_NOSPEC
++void do_barrier_nospec_fixups_range(bool enable, void *start, void *end);
++#else
++static inline void do_barrier_nospec_fixups_range(bool enable, void *start, void *end) { };
++#endif
++
++#ifdef CONFIG_PPC_FSL_BOOK3E
++void setup_spectre_v2(void);
++#else
++static inline void setup_spectre_v2(void) {};
++#endif
++void do_btb_flush_fixups(void);
+ 
+ #endif /* !__ASSEMBLY__ */
+ 
+diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
+index cf26e62b268d..bd6d0fb5be9f 100644
+--- a/arch/powerpc/include/asm/uaccess.h
++++ b/arch/powerpc/include/asm/uaccess.h
+@@ -238,6 +238,7 @@ do {								\
+ 	__chk_user_ptr(ptr);					\
+ 	if (!is_kernel_addr((unsigned long)__gu_addr))		\
+ 		might_fault();					\
++	barrier_nospec();					\
+ 	__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
+ 	(x) = (__typeof__(*(ptr)))__gu_val;			\
+ 	__gu_err;						\
+@@ -249,8 +250,10 @@ do {								\
+ 	__long_type(*(ptr)) __gu_val = 0;				\
+ 	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
+ 	might_fault();							\
+-	if (access_ok(VERIFY_READ, __gu_addr, (size)))			\
++	if (access_ok(VERIFY_READ, __gu_addr, (size))) {		\
++		barrier_nospec();					\
+ 		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
++	}								\
+ 	(x) = (__force __typeof__(*(ptr)))__gu_val;				\
+ 	__gu_err;							\
+ })
+@@ -261,6 +264,7 @@ do {								\
+ 	__long_type(*(ptr)) __gu_val;				\
+ 	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);	\
+ 	__chk_user_ptr(ptr);					\
++	barrier_nospec();					\
+ 	__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
+ 	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
+ 	__gu_err;						\
+@@ -288,15 +292,19 @@ static inline unsigned long raw_copy_from_user(void *to,
+ 
+ 		switch (n) {
+ 		case 1:
++			barrier_nospec();
+ 			__get_user_size(*(u8 *)to, from, 1, ret);
+ 			break;
+ 		case 2:
++			barrier_nospec();
+ 			__get_user_size(*(u16 *)to, from, 2, ret);
+ 			break;
+ 		case 4:
++			barrier_nospec();
+ 			__get_user_size(*(u32 *)to, from, 4, ret);
+ 			break;
+ 		case 8:
++			barrier_nospec();
+ 			__get_user_size(*(u64 *)to, from, 8, ret);
+ 			break;
+ 		}
+@@ -304,6 +312,7 @@ static inline unsigned long raw_copy_from_user(void *to,
+ 			return 0;
+ 	}
+ 
++	barrier_nospec();
+ 	return __copy_tofrom_user((__force void __user *)to, from, n);
+ }
+ 
+diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
+index a1089c9a9aa5..142b08d40642 100644
+--- a/arch/powerpc/kernel/Makefile
++++ b/arch/powerpc/kernel/Makefile
+@@ -45,9 +45,10 @@ obj-$(CONFIG_VDSO32)		+= vdso32/
+ obj-$(CONFIG_PPC_WATCHDOG)	+= watchdog.o
+ obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= hw_breakpoint.o
+ obj-$(CONFIG_PPC_BOOK3S_64)	+= cpu_setup_ppc970.o cpu_setup_pa6t.o
+-obj-$(CONFIG_PPC_BOOK3S_64)	+= cpu_setup_power.o security.o
++obj-$(CONFIG_PPC_BOOK3S_64)	+= cpu_setup_power.o
+ obj-$(CONFIG_PPC_BOOK3S_64)	+= mce.o mce_power.o
+ obj-$(CONFIG_PPC_BOOK3E_64)	+= exceptions-64e.o idle_book3e.o
++obj-$(CONFIG_PPC_BARRIER_NOSPEC) += security.o
+ obj-$(CONFIG_PPC64)		+= vdso64/
+ obj-$(CONFIG_ALTIVEC)		+= vecemu.o
+ obj-$(CONFIG_PPC_970_NAP)	+= idle_power4.o
+diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
+index 4ae464b9d490..a2999cd73a82 100644
+--- a/arch/powerpc/kernel/entry_32.S
++++ b/arch/powerpc/kernel/entry_32.S
+@@ -33,6 +33,7 @@
+ #include <asm/unistd.h>
+ #include <asm/ptrace.h>
+ #include <asm/export.h>
++#include <asm/barrier.h>
+ 
+ /*
+  * MSR_KERNEL is > 0x10000 on 4xx/Book-E since it include MSR_CE.
+@@ -358,6 +359,15 @@ syscall_dotrace_cont:
+ 	ori	r10,r10,sys_call_table@l
+ 	slwi	r0,r0,2
+ 	bge-	66f
++
++	barrier_nospec_asm
++	/*
++	 * Prevent the load of the handler below (based on the user-passed
++	 * system call number) being speculatively executed until the test
++	 * against NR_syscalls and branch to .66f above has
++	 * committed.
++	 */
++
+ 	lwzx	r10,r10,r0	/* Fetch system call handler [ptr] */
+ 	mtlr	r10
+ 	addi	r9,r1,STACK_FRAME_OVERHEAD
+diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
+index c194f4c8e66b..12395895b9aa 100644
+--- a/arch/powerpc/kernel/entry_64.S
++++ b/arch/powerpc/kernel/entry_64.S
+@@ -25,6 +25,7 @@
+ #include <asm/page.h>
+ #include <asm/mmu.h>
+ #include <asm/thread_info.h>
++#include <asm/code-patching-asm.h>
+ #include <asm/ppc_asm.h>
+ #include <asm/asm-offsets.h>
+ #include <asm/cputable.h>
+@@ -36,6 +37,7 @@
+ #include <asm/context_tracking.h>
+ #include <asm/tm.h>
+ #include <asm/ppc-opcode.h>
++#include <asm/barrier.h>
+ #include <asm/export.h>
+ #ifdef CONFIG_PPC_BOOK3S
+ #include <asm/exception-64s.h>
+@@ -76,6 +78,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_TM)
+ 	std	r0,GPR0(r1)
+ 	std	r10,GPR1(r1)
+ 	beq	2f			/* if from kernel mode */
++#ifdef CONFIG_PPC_FSL_BOOK3E
++START_BTB_FLUSH_SECTION
++	BTB_FLUSH(r10)
++END_BTB_FLUSH_SECTION
++#endif
+ 	ACCOUNT_CPU_USER_ENTRY(r13, r10, r11)
+ 2:	std	r2,GPR2(r1)
+ 	std	r3,GPR3(r1)
+@@ -179,6 +186,15 @@ system_call:			/* label this so stack traces look sane */
+ 	clrldi	r8,r8,32
+ 15:
+ 	slwi	r0,r0,4
++
++	barrier_nospec_asm
++	/*
++	 * Prevent the load of the handler below (based on the user-passed
++	 * system call number) being speculatively executed until the test
++	 * against NR_syscalls and branch to .Lsyscall_enosys above has
++	 * committed.
++	 */
++
+ 	ldx	r12,r11,r0	/* Fetch system call handler [ptr] */
+ 	mtctr   r12
+ 	bctrl			/* Call handler */
+@@ -487,6 +503,57 @@ _GLOBAL(ret_from_kernel_thread)
+ 	li	r3,0
+ 	b	.Lsyscall_exit
+ 
++#ifdef CONFIG_PPC_BOOK3S_64
++
++#define FLUSH_COUNT_CACHE	\
++1:	nop;			\
++	patch_site 1b, patch__call_flush_count_cache
++
++
++#define BCCTR_FLUSH	.long 0x4c400420
++
++.macro nops number
++	.rept \number
++	nop
++	.endr
++.endm
++
++.balign 32
++.global flush_count_cache
++flush_count_cache:
++	/* Save LR into r9 */
++	mflr	r9
++
++	.rept 64
++	bl	.+4
++	.endr
++	b	1f
++	nops	6
++
++	.balign 32
++	/* Restore LR */
++1:	mtlr	r9
++	li	r9,0x7fff
++	mtctr	r9
++
++	BCCTR_FLUSH
++
++2:	nop
++	patch_site 2b patch__flush_count_cache_return
++
++	nops	3
++
++	.rept 278
++	.balign 32
++	BCCTR_FLUSH
++	nops	7
++	.endr
++
++	blr
++#else
++#define FLUSH_COUNT_CACHE
++#endif /* CONFIG_PPC_BOOK3S_64 */
++
+ /*
+  * This routine switches between two different tasks.  The process
+  * state of one is saved on its kernel stack.  Then the state
+@@ -518,6 +585,8 @@ _GLOBAL(_switch)
+ 	std	r23,_CCR(r1)
+ 	std	r1,KSP(r3)	/* Set old stack pointer */
+ 
++	FLUSH_COUNT_CACHE
++
+ 	/*
+ 	 * On SMP kernels, care must be taken because a task may be
+ 	 * scheduled off CPUx and on to CPUy. Memory ordering must be
+diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
+index acd8ca76233e..2edc1b7b34cc 100644
+--- a/arch/powerpc/kernel/exceptions-64e.S
++++ b/arch/powerpc/kernel/exceptions-64e.S
+@@ -295,7 +295,8 @@ ret_from_mc_except:
+ 	andi.	r10,r11,MSR_PR;		/* save stack pointer */	    \
+ 	beq	1f;			/* branch around if supervisor */   \
+ 	ld	r1,PACAKSAVE(r13);	/* get kernel stack coming from usr */\
+-1:	cmpdi	cr1,r1,0;		/* check if SP makes sense */	    \
++1:	type##_BTB_FLUSH		\
++	cmpdi	cr1,r1,0;		/* check if SP makes sense */	    \
+ 	bge-	cr1,exc_##n##_bad_stack;/* bad stack (TODO: out of line) */ \
+ 	mfspr	r10,SPRN_##type##_SRR0;	/* read SRR0 before touching stack */
+ 
+@@ -327,6 +328,30 @@ ret_from_mc_except:
+ #define SPRN_MC_SRR0	SPRN_MCSRR0
+ #define SPRN_MC_SRR1	SPRN_MCSRR1
+ 
++#ifdef CONFIG_PPC_FSL_BOOK3E
++#define GEN_BTB_FLUSH			\
++	START_BTB_FLUSH_SECTION		\
++		beq 1f;			\
++		BTB_FLUSH(r10)			\
++		1:		\
++	END_BTB_FLUSH_SECTION
++
++#define CRIT_BTB_FLUSH			\
++	START_BTB_FLUSH_SECTION		\
++		BTB_FLUSH(r10)		\
++	END_BTB_FLUSH_SECTION
++
++#define DBG_BTB_FLUSH CRIT_BTB_FLUSH
++#define MC_BTB_FLUSH CRIT_BTB_FLUSH
++#define GDBELL_BTB_FLUSH GEN_BTB_FLUSH
++#else
++#define GEN_BTB_FLUSH
++#define CRIT_BTB_FLUSH
++#define DBG_BTB_FLUSH
++#define MC_BTB_FLUSH
++#define GDBELL_BTB_FLUSH
++#endif
++
+ #define NORMAL_EXCEPTION_PROLOG(n, intnum, addition)			    \
+ 	EXCEPTION_PROLOG(n, intnum, GEN, addition##_GEN(n))
+ 
+diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
+index d0862a100d29..306e26c073a0 100644
+--- a/arch/powerpc/kernel/head_booke.h
++++ b/arch/powerpc/kernel/head_booke.h
+@@ -32,6 +32,16 @@
+  */
+ #define THREAD_NORMSAVE(offset)	(THREAD_NORMSAVES + (offset * 4))
+ 
++#ifdef CONFIG_PPC_FSL_BOOK3E
++#define BOOKE_CLEAR_BTB(reg)									\
++START_BTB_FLUSH_SECTION								\
++	BTB_FLUSH(reg)									\
++END_BTB_FLUSH_SECTION
++#else
++#define BOOKE_CLEAR_BTB(reg)
++#endif
++
++
+ #define NORMAL_EXCEPTION_PROLOG(intno)						     \
+ 	mtspr	SPRN_SPRG_WSCRATCH0, r10;	/* save one register */	     \
+ 	mfspr	r10, SPRN_SPRG_THREAD;					     \
+@@ -43,6 +53,7 @@
+ 	andi.	r11, r11, MSR_PR;	/* check whether user or kernel    */\
+ 	mr	r11, r1;						     \
+ 	beq	1f;							     \
++	BOOKE_CLEAR_BTB(r11)						\
+ 	/* if from user, start at top of this thread's kernel stack */       \
+ 	lwz	r11, THREAD_INFO-THREAD(r10);				     \
+ 	ALLOC_STACK_FRAME(r11, THREAD_SIZE);				     \
+@@ -128,6 +139,7 @@
+ 	stw	r9,_CCR(r8);		/* save CR on stack		   */\
+ 	mfspr	r11,exc_level_srr1;	/* check whether user or kernel    */\
+ 	DO_KVM	BOOKE_INTERRUPT_##intno exc_level_srr1;		             \
++	BOOKE_CLEAR_BTB(r10)						\
+ 	andi.	r11,r11,MSR_PR;						     \
+ 	mfspr	r11,SPRN_SPRG_THREAD;	/* if from user, start at top of   */\
+ 	lwz	r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\
+diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
+index bf4c6021515f..60a0aeefc4a7 100644
+--- a/arch/powerpc/kernel/head_fsl_booke.S
++++ b/arch/powerpc/kernel/head_fsl_booke.S
+@@ -452,6 +452,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
+ 	mfcr	r13
+ 	stw	r13, THREAD_NORMSAVE(3)(r10)
+ 	DO_KVM	BOOKE_INTERRUPT_DTLB_MISS SPRN_SRR1
++START_BTB_FLUSH_SECTION
++	mfspr r11, SPRN_SRR1
++	andi. r10,r11,MSR_PR
++	beq 1f
++	BTB_FLUSH(r10)
++1:
++END_BTB_FLUSH_SECTION
+ 	mfspr	r10, SPRN_DEAR		/* Get faulting address */
+ 
+ 	/* If we are faulting a kernel address, we have to use the
+@@ -546,6 +553,14 @@ END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
+ 	mfcr	r13
+ 	stw	r13, THREAD_NORMSAVE(3)(r10)
+ 	DO_KVM	BOOKE_INTERRUPT_ITLB_MISS SPRN_SRR1
++START_BTB_FLUSH_SECTION
++	mfspr r11, SPRN_SRR1
++	andi. r10,r11,MSR_PR
++	beq 1f
++	BTB_FLUSH(r10)
++1:
++END_BTB_FLUSH_SECTION
++
+ 	mfspr	r10, SPRN_SRR0		/* Get faulting address */
+ 
+ 	/* If we are faulting a kernel address, we have to use the
+diff --git a/arch/powerpc/kernel/module.c b/arch/powerpc/kernel/module.c
+index 3f7ba0f5bf29..77371c9ef3d8 100644
+--- a/arch/powerpc/kernel/module.c
++++ b/arch/powerpc/kernel/module.c
+@@ -72,7 +72,15 @@ int module_finalize(const Elf_Ehdr *hdr,
+ 		do_feature_fixups(powerpc_firmware_features,
+ 				  (void *)sect->sh_addr,
+ 				  (void *)sect->sh_addr + sect->sh_size);
+-#endif
++#endif /* CONFIG_PPC64 */
++
++#ifdef CONFIG_PPC_BARRIER_NOSPEC
++	sect = find_section(hdr, sechdrs, "__spec_barrier_fixup");
++	if (sect != NULL)
++		do_barrier_nospec_fixups_range(barrier_nospec_enabled,
++				  (void *)sect->sh_addr,
++				  (void *)sect->sh_addr + sect->sh_size);
++#endif /* CONFIG_PPC_BARRIER_NOSPEC */
+ 
+ 	sect = find_section(hdr, sechdrs, "__lwsync_fixup");
+ 	if (sect != NULL)
+diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
+index b98a722da915..48b50fb8dc4b 100644
+--- a/arch/powerpc/kernel/security.c
++++ b/arch/powerpc/kernel/security.c
+@@ -9,11 +9,120 @@
+ #include <linux/seq_buf.h>
+ 
+ #include <asm/debugfs.h>
++#include <asm/asm-prototypes.h>
++#include <asm/code-patching.h>
+ #include <asm/security_features.h>
++#include <asm/setup.h>
+ 
+ 
+ unsigned long powerpc_security_features __read_mostly = SEC_FTR_DEFAULT;
+ 
++enum count_cache_flush_type {
++	COUNT_CACHE_FLUSH_NONE	= 0x1,
++	COUNT_CACHE_FLUSH_SW	= 0x2,
++	COUNT_CACHE_FLUSH_HW	= 0x4,
++};
++static enum count_cache_flush_type count_cache_flush_type = COUNT_CACHE_FLUSH_NONE;
++
++bool barrier_nospec_enabled;
++static bool no_nospec;
++static bool btb_flush_enabled;
++#ifdef CONFIG_PPC_FSL_BOOK3E
++static bool no_spectrev2;
++#endif
++
++static void enable_barrier_nospec(bool enable)
++{
++	barrier_nospec_enabled = enable;
++	do_barrier_nospec_fixups(enable);
++}
++
++void setup_barrier_nospec(void)
++{
++	bool enable;
++
++	/*
++	 * It would make sense to check SEC_FTR_SPEC_BAR_ORI31 below as well.
++	 * But there's a good reason not to. The two flags we check below are
++	 * both are enabled by default in the kernel, so if the hcall is not
++	 * functional they will be enabled.
++	 * On a system where the host firmware has been updated (so the ori
++	 * functions as a barrier), but on which the hypervisor (KVM/Qemu) has
++	 * not been updated, we would like to enable the barrier. Dropping the
++	 * check for SEC_FTR_SPEC_BAR_ORI31 achieves that. The only downside is
++	 * we potentially enable the barrier on systems where the host firmware
++	 * is not updated, but that's harmless as it's a no-op.
++	 */
++	enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) &&
++		 security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR);
++
++	if (!no_nospec)
++		enable_barrier_nospec(enable);
++}
++
++static int __init handle_nospectre_v1(char *p)
++{
++	no_nospec = true;
++
++	return 0;
++}
++early_param("nospectre_v1", handle_nospectre_v1);
++
++#ifdef CONFIG_DEBUG_FS
++static int barrier_nospec_set(void *data, u64 val)
++{
++	switch (val) {
++	case 0:
++	case 1:
++		break;
++	default:
++		return -EINVAL;
++	}
++
++	if (!!val == !!barrier_nospec_enabled)
++		return 0;
++
++	enable_barrier_nospec(!!val);
++
++	return 0;
++}
++
++static int barrier_nospec_get(void *data, u64 *val)
++{
++	*val = barrier_nospec_enabled ? 1 : 0;
++	return 0;
++}
++
++DEFINE_SIMPLE_ATTRIBUTE(fops_barrier_nospec,
++			barrier_nospec_get, barrier_nospec_set, "%llu\n");
++
++static __init int barrier_nospec_debugfs_init(void)
++{
++	debugfs_create_file("barrier_nospec", 0600, powerpc_debugfs_root, NULL,
++			    &fops_barrier_nospec);
++	return 0;
++}
++device_initcall(barrier_nospec_debugfs_init);
++#endif /* CONFIG_DEBUG_FS */
++
++#ifdef CONFIG_PPC_FSL_BOOK3E
++static int __init handle_nospectre_v2(char *p)
++{
++	no_spectrev2 = true;
++
++	return 0;
++}
++early_param("nospectre_v2", handle_nospectre_v2);
++void setup_spectre_v2(void)
++{
++	if (no_spectrev2)
++		do_btb_flush_fixups();
++	else
++		btb_flush_enabled = true;
++}
++#endif /* CONFIG_PPC_FSL_BOOK3E */
++
++#ifdef CONFIG_PPC_BOOK3S_64
+ ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, char *buf)
+ {
+ 	bool thread_priv;
+@@ -46,25 +155,39 @@ ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, cha
+ 
+ 	return sprintf(buf, "Vulnerable\n");
+ }
++#endif
+ 
+ ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, char *buf)
+ {
+-	if (!security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR))
+-		return sprintf(buf, "Not affected\n");
++	struct seq_buf s;
+ 
+-	return sprintf(buf, "Vulnerable\n");
++	seq_buf_init(&s, buf, PAGE_SIZE - 1);
++
++	if (security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR)) {
++		if (barrier_nospec_enabled)
++			seq_buf_printf(&s, "Mitigation: __user pointer sanitization");
++		else
++			seq_buf_printf(&s, "Vulnerable");
++
++		if (security_ftr_enabled(SEC_FTR_SPEC_BAR_ORI31))
++			seq_buf_printf(&s, ", ori31 speculation barrier enabled");
++
++		seq_buf_printf(&s, "\n");
++	} else
++		seq_buf_printf(&s, "Not affected\n");
++
++	return s.len;
+ }
+ 
+ ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, char *buf)
+ {
+-	bool bcs, ccd, ori;
+ 	struct seq_buf s;
++	bool bcs, ccd;
+ 
+ 	seq_buf_init(&s, buf, PAGE_SIZE - 1);
+ 
+ 	bcs = security_ftr_enabled(SEC_FTR_BCCTRL_SERIALISED);
+ 	ccd = security_ftr_enabled(SEC_FTR_COUNT_CACHE_DISABLED);
+-	ori = security_ftr_enabled(SEC_FTR_SPEC_BAR_ORI31);
+ 
+ 	if (bcs || ccd) {
+ 		seq_buf_printf(&s, "Mitigation: ");
+@@ -77,17 +200,23 @@ ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, c
+ 
+ 		if (ccd)
+ 			seq_buf_printf(&s, "Indirect branch cache disabled");
+-	} else
++	} else if (count_cache_flush_type != COUNT_CACHE_FLUSH_NONE) {
++		seq_buf_printf(&s, "Mitigation: Software count cache flush");
++
++		if (count_cache_flush_type == COUNT_CACHE_FLUSH_HW)
++			seq_buf_printf(&s, " (hardware accelerated)");
++	} else if (btb_flush_enabled) {
++		seq_buf_printf(&s, "Mitigation: Branch predictor state flush");
++	} else {
+ 		seq_buf_printf(&s, "Vulnerable");
+-
+-	if (ori)
+-		seq_buf_printf(&s, ", ori31 speculation barrier enabled");
++	}
+ 
+ 	seq_buf_printf(&s, "\n");
+ 
+ 	return s.len;
+ }
+ 
++#ifdef CONFIG_PPC_BOOK3S_64
+ /*
+  * Store-forwarding barrier support.
+  */
+@@ -235,3 +364,71 @@ static __init int stf_barrier_debugfs_init(void)
+ }
+ device_initcall(stf_barrier_debugfs_init);
+ #endif /* CONFIG_DEBUG_FS */
++
++static void toggle_count_cache_flush(bool enable)
++{
++	if (!enable || !security_ftr_enabled(SEC_FTR_FLUSH_COUNT_CACHE)) {
++		patch_instruction_site(&patch__call_flush_count_cache, PPC_INST_NOP);
++		count_cache_flush_type = COUNT_CACHE_FLUSH_NONE;
++		pr_info("count-cache-flush: software flush disabled.\n");
++		return;
++	}
++
++	patch_branch_site(&patch__call_flush_count_cache,
++			  (u64)&flush_count_cache, BRANCH_SET_LINK);
++
++	if (!security_ftr_enabled(SEC_FTR_BCCTR_FLUSH_ASSIST)) {
++		count_cache_flush_type = COUNT_CACHE_FLUSH_SW;
++		pr_info("count-cache-flush: full software flush sequence enabled.\n");
++		return;
++	}
++
++	patch_instruction_site(&patch__flush_count_cache_return, PPC_INST_BLR);
++	count_cache_flush_type = COUNT_CACHE_FLUSH_HW;
++	pr_info("count-cache-flush: hardware assisted flush sequence enabled\n");
++}
++
++void setup_count_cache_flush(void)
++{
++	toggle_count_cache_flush(true);
++}
++
++#ifdef CONFIG_DEBUG_FS
++static int count_cache_flush_set(void *data, u64 val)
++{
++	bool enable;
++
++	if (val == 1)
++		enable = true;
++	else if (val == 0)
++		enable = false;
++	else
++		return -EINVAL;
++
++	toggle_count_cache_flush(enable);
++
++	return 0;
++}
++
++static int count_cache_flush_get(void *data, u64 *val)
++{
++	if (count_cache_flush_type == COUNT_CACHE_FLUSH_NONE)
++		*val = 0;
++	else
++		*val = 1;
++
++	return 0;
++}
++
++DEFINE_SIMPLE_ATTRIBUTE(fops_count_cache_flush, count_cache_flush_get,
++			count_cache_flush_set, "%llu\n");
++
++static __init int count_cache_flush_debugfs_init(void)
++{
++	debugfs_create_file("count_cache_flush", 0600, powerpc_debugfs_root,
++			    NULL, &fops_count_cache_flush);
++	return 0;
++}
++device_initcall(count_cache_flush_debugfs_init);
++#endif /* CONFIG_DEBUG_FS */
++#endif /* CONFIG_PPC_BOOK3S_64 */
+diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
+index 008447664643..c58364c74dad 100644
+--- a/arch/powerpc/kernel/setup-common.c
++++ b/arch/powerpc/kernel/setup-common.c
+@@ -937,6 +937,9 @@ void __init setup_arch(char **cmdline_p)
+ 	if (ppc_md.setup_arch)
+ 		ppc_md.setup_arch();
+ 
++	setup_barrier_nospec();
++	setup_spectre_v2();
++
+ 	paging_init();
+ 
+ 	/* Initialize the MMU context management stuff. */
+diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
+index c89ffb88fa3b..b0cf4af7ba84 100644
+--- a/arch/powerpc/kernel/vmlinux.lds.S
++++ b/arch/powerpc/kernel/vmlinux.lds.S
+@@ -153,8 +153,25 @@ SECTIONS
+ 		*(__rfi_flush_fixup)
+ 		__stop___rfi_flush_fixup = .;
+ 	}
+-#endif
++#endif /* CONFIG_PPC64 */
++
++#ifdef CONFIG_PPC_BARRIER_NOSPEC
++	. = ALIGN(8);
++	__spec_barrier_fixup : AT(ADDR(__spec_barrier_fixup) - LOAD_OFFSET) {
++		__start___barrier_nospec_fixup = .;
++		*(__barrier_nospec_fixup)
++		__stop___barrier_nospec_fixup = .;
++	}
++#endif /* CONFIG_PPC_BARRIER_NOSPEC */
+ 
++#ifdef CONFIG_PPC_FSL_BOOK3E
++	. = ALIGN(8);
++	__spec_btb_flush_fixup : AT(ADDR(__spec_btb_flush_fixup) - LOAD_OFFSET) {
++		__start__btb_flush_fixup = .;
++		*(__btb_flush_fixup)
++		__stop__btb_flush_fixup = .;
++	}
++#endif
+ 	EXCEPTION_TABLE(0)
+ 
+ 	NOTES :kernel :notes
+diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S
+index 81bd8a07aa51..612b7f6a887f 100644
+--- a/arch/powerpc/kvm/bookehv_interrupts.S
++++ b/arch/powerpc/kvm/bookehv_interrupts.S
+@@ -75,6 +75,10 @@
+ 	PPC_LL	r1, VCPU_HOST_STACK(r4)
+ 	PPC_LL	r2, HOST_R2(r1)
+ 
++START_BTB_FLUSH_SECTION
++	BTB_FLUSH(r10)
++END_BTB_FLUSH_SECTION
++
+ 	mfspr	r10, SPRN_PID
+ 	lwz	r8, VCPU_HOST_PID(r4)
+ 	PPC_LL	r11, VCPU_SHARED(r4)
+diff --git a/arch/powerpc/kvm/e500_emulate.c b/arch/powerpc/kvm/e500_emulate.c
+index 990db69a1d0b..fa88f641ac03 100644
+--- a/arch/powerpc/kvm/e500_emulate.c
++++ b/arch/powerpc/kvm/e500_emulate.c
+@@ -277,6 +277,13 @@ int kvmppc_core_emulate_mtspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong spr_va
+ 		vcpu->arch.pwrmgtcr0 = spr_val;
+ 		break;
+ 
++	case SPRN_BUCSR:
++		/*
++		 * If we are here, it means that we have already flushed the
++		 * branch predictor, so just return to guest.
++		 */
++		break;
++
+ 	/* extra exceptions */
+ #ifdef CONFIG_SPE_POSSIBLE
+ 	case SPRN_IVOR32:
+diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c
+index 130405158afa..c5154817178b 100644
+--- a/arch/powerpc/lib/code-patching.c
++++ b/arch/powerpc/lib/code-patching.c
+@@ -206,6 +206,22 @@ int patch_branch(unsigned int *addr, unsigned long target, int flags)
+ 	return patch_instruction(addr, create_branch(addr, target, flags));
+ }
+ 
++int patch_branch_site(s32 *site, unsigned long target, int flags)
++{
++	unsigned int *addr;
++
++	addr = (unsigned int *)((unsigned long)site + *site);
++	return patch_instruction(addr, create_branch(addr, target, flags));
++}
++
++int patch_instruction_site(s32 *site, unsigned int instr)
++{
++	unsigned int *addr;
++
++	addr = (unsigned int *)((unsigned long)site + *site);
++	return patch_instruction(addr, instr);
++}
++
+ bool is_offset_in_branch_range(long offset)
+ {
+ 	/*
+diff --git a/arch/powerpc/lib/feature-fixups.c b/arch/powerpc/lib/feature-fixups.c
+index e1bcdc32a851..de7861e09b41 100644
+--- a/arch/powerpc/lib/feature-fixups.c
++++ b/arch/powerpc/lib/feature-fixups.c
+@@ -277,8 +277,101 @@ void do_rfi_flush_fixups(enum l1d_flush_type types)
+ 		(types &  L1D_FLUSH_MTTRIG)     ? "mttrig type"
+ 						: "unknown");
+ }
++
++void do_barrier_nospec_fixups_range(bool enable, void *fixup_start, void *fixup_end)
++{
++	unsigned int instr, *dest;
++	long *start, *end;
++	int i;
++
++	start = fixup_start;
++	end = fixup_end;
++
++	instr = 0x60000000; /* nop */
++
++	if (enable) {
++		pr_info("barrier-nospec: using ORI speculation barrier\n");
++		instr = 0x63ff0000; /* ori 31,31,0 speculation barrier */
++	}
++
++	for (i = 0; start < end; start++, i++) {
++		dest = (void *)start + *start;
++
++		pr_devel("patching dest %lx\n", (unsigned long)dest);
++		patch_instruction(dest, instr);
++	}
++
++	printk(KERN_DEBUG "barrier-nospec: patched %d locations\n", i);
++}
++
+ #endif /* CONFIG_PPC_BOOK3S_64 */
+ 
++#ifdef CONFIG_PPC_BARRIER_NOSPEC
++void do_barrier_nospec_fixups(bool enable)
++{
++	void *start, *end;
++
++	start = PTRRELOC(&__start___barrier_nospec_fixup),
++	end = PTRRELOC(&__stop___barrier_nospec_fixup);
++
++	do_barrier_nospec_fixups_range(enable, start, end);
++}
++#endif /* CONFIG_PPC_BARRIER_NOSPEC */
++
++#ifdef CONFIG_PPC_FSL_BOOK3E
++void do_barrier_nospec_fixups_range(bool enable, void *fixup_start, void *fixup_end)
++{
++	unsigned int instr[2], *dest;
++	long *start, *end;
++	int i;
++
++	start = fixup_start;
++	end = fixup_end;
++
++	instr[0] = PPC_INST_NOP;
++	instr[1] = PPC_INST_NOP;
++
++	if (enable) {
++		pr_info("barrier-nospec: using isync; sync as speculation barrier\n");
++		instr[0] = PPC_INST_ISYNC;
++		instr[1] = PPC_INST_SYNC;
++	}
++
++	for (i = 0; start < end; start++, i++) {
++		dest = (void *)start + *start;
++
++		pr_devel("patching dest %lx\n", (unsigned long)dest);
++		patch_instruction(dest, instr[0]);
++		patch_instruction(dest + 1, instr[1]);
++	}
++
++	printk(KERN_DEBUG "barrier-nospec: patched %d locations\n", i);
++}
++
++static void patch_btb_flush_section(long *curr)
++{
++	unsigned int *start, *end;
++
++	start = (void *)curr + *curr;
++	end = (void *)curr + *(curr + 1);
++	for (; start < end; start++) {
++		pr_devel("patching dest %lx\n", (unsigned long)start);
++		patch_instruction(start, PPC_INST_NOP);
++	}
++}
++
++void do_btb_flush_fixups(void)
++{
++	long *start, *end;
++
++	start = PTRRELOC(&__start__btb_flush_fixup);
++	end = PTRRELOC(&__stop__btb_flush_fixup);
++
++	for (; start < end; start += 2)
++		patch_btb_flush_section(start);
++}
++#endif /* CONFIG_PPC_FSL_BOOK3E */
++
+ void do_lwsync_fixups(unsigned long value, void *fixup_start, void *fixup_end)
+ {
+ 	long *start, *end;
+diff --git a/arch/powerpc/mm/tlb_low_64e.S b/arch/powerpc/mm/tlb_low_64e.S
+index eb82d787d99a..b7e9c09dfe19 100644
+--- a/arch/powerpc/mm/tlb_low_64e.S
++++ b/arch/powerpc/mm/tlb_low_64e.S
+@@ -69,6 +69,13 @@ END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
+ 	std	r15,EX_TLB_R15(r12)
+ 	std	r10,EX_TLB_CR(r12)
+ #ifdef CONFIG_PPC_FSL_BOOK3E
++START_BTB_FLUSH_SECTION
++	mfspr r11, SPRN_SRR1
++	andi. r10,r11,MSR_PR
++	beq 1f
++	BTB_FLUSH(r10)
++1:
++END_BTB_FLUSH_SECTION
+ 	std	r7,EX_TLB_R7(r12)
+ #endif
+ 	TLB_MISS_PROLOG_STATS
+diff --git a/arch/powerpc/net/bpf_jit.h b/arch/powerpc/net/bpf_jit.h
+index 47fc6660845d..68dece206048 100644
+--- a/arch/powerpc/net/bpf_jit.h
++++ b/arch/powerpc/net/bpf_jit.h
+@@ -51,6 +51,8 @@
+ #define PPC_LIS(r, i)		PPC_ADDIS(r, 0, i)
+ #define PPC_STD(r, base, i)	EMIT(PPC_INST_STD | ___PPC_RS(r) |	      \
+ 				     ___PPC_RA(base) | ((i) & 0xfffc))
++#define PPC_STDX(r, base, b)	EMIT(PPC_INST_STDX | ___PPC_RS(r) |	      \
++				     ___PPC_RA(base) | ___PPC_RB(b))
+ #define PPC_STDU(r, base, i)	EMIT(PPC_INST_STDU | ___PPC_RS(r) |	      \
+ 				     ___PPC_RA(base) | ((i) & 0xfffc))
+ #define PPC_STW(r, base, i)	EMIT(PPC_INST_STW | ___PPC_RS(r) |	      \
+@@ -65,7 +67,9 @@
+ #define PPC_LBZ(r, base, i)	EMIT(PPC_INST_LBZ | ___PPC_RT(r) |	      \
+ 				     ___PPC_RA(base) | IMM_L(i))
+ #define PPC_LD(r, base, i)	EMIT(PPC_INST_LD | ___PPC_RT(r) |	      \
+-				     ___PPC_RA(base) | IMM_L(i))
++				     ___PPC_RA(base) | ((i) & 0xfffc))
++#define PPC_LDX(r, base, b)	EMIT(PPC_INST_LDX | ___PPC_RT(r) |	      \
++				     ___PPC_RA(base) | ___PPC_RB(b))
+ #define PPC_LWZ(r, base, i)	EMIT(PPC_INST_LWZ | ___PPC_RT(r) |	      \
+ 				     ___PPC_RA(base) | IMM_L(i))
+ #define PPC_LHZ(r, base, i)	EMIT(PPC_INST_LHZ | ___PPC_RT(r) |	      \
+@@ -85,17 +89,6 @@
+ 					___PPC_RA(a) | ___PPC_RB(b))
+ #define PPC_BPF_STDCX(s, a, b)	EMIT(PPC_INST_STDCX | ___PPC_RS(s) |	      \
+ 					___PPC_RA(a) | ___PPC_RB(b))
+-
+-#ifdef CONFIG_PPC64
+-#define PPC_BPF_LL(r, base, i) do { PPC_LD(r, base, i); } while(0)
+-#define PPC_BPF_STL(r, base, i) do { PPC_STD(r, base, i); } while(0)
+-#define PPC_BPF_STLU(r, base, i) do { PPC_STDU(r, base, i); } while(0)
+-#else
+-#define PPC_BPF_LL(r, base, i) do { PPC_LWZ(r, base, i); } while(0)
+-#define PPC_BPF_STL(r, base, i) do { PPC_STW(r, base, i); } while(0)
+-#define PPC_BPF_STLU(r, base, i) do { PPC_STWU(r, base, i); } while(0)
+-#endif
+-
+ #define PPC_CMPWI(a, i)		EMIT(PPC_INST_CMPWI | ___PPC_RA(a) | IMM_L(i))
+ #define PPC_CMPDI(a, i)		EMIT(PPC_INST_CMPDI | ___PPC_RA(a) | IMM_L(i))
+ #define PPC_CMPW(a, b)		EMIT(PPC_INST_CMPW | ___PPC_RA(a) |	      \
+diff --git a/arch/powerpc/net/bpf_jit32.h b/arch/powerpc/net/bpf_jit32.h
+index a8cd7e289ecd..81a9045d8410 100644
+--- a/arch/powerpc/net/bpf_jit32.h
++++ b/arch/powerpc/net/bpf_jit32.h
+@@ -122,6 +122,10 @@ DECLARE_LOAD_FUNC(sk_load_byte_msh);
+ #define PPC_NTOHS_OFFS(r, base, i)	PPC_LHZ_OFFS(r, base, i)
+ #endif
+ 
++#define PPC_BPF_LL(r, base, i) do { PPC_LWZ(r, base, i); } while(0)
++#define PPC_BPF_STL(r, base, i) do { PPC_STW(r, base, i); } while(0)
++#define PPC_BPF_STLU(r, base, i) do { PPC_STWU(r, base, i); } while(0)
++
+ #define SEEN_DATAREF 0x10000 /* might call external helpers */
+ #define SEEN_XREG    0x20000 /* X reg is used */
+ #define SEEN_MEM     0x40000 /* SEEN_MEM+(1<<n) = use mem[n] for temporary
+diff --git a/arch/powerpc/net/bpf_jit64.h b/arch/powerpc/net/bpf_jit64.h
+index 62fa7589db2b..bb944b6018d7 100644
+--- a/arch/powerpc/net/bpf_jit64.h
++++ b/arch/powerpc/net/bpf_jit64.h
+@@ -86,6 +86,26 @@ DECLARE_LOAD_FUNC(sk_load_byte);
+ 			(imm >= SKF_LL_OFF ? func##_negative_offset : func) :	\
+ 			func##_positive_offset)
+ 
++/*
++ * WARNING: These can use TMP_REG_2 if the offset is not at word boundary,
++ * so ensure that it isn't in use already.
++ */
++#define PPC_BPF_LL(r, base, i) do {					      \
++				if ((i) % 4) {				      \
++					PPC_LI(b2p[TMP_REG_2], (i));	      \
++					PPC_LDX(r, base, b2p[TMP_REG_2]);     \
++				} else					      \
++					PPC_LD(r, base, i);		      \
++				} while(0)
++#define PPC_BPF_STL(r, base, i) do {					      \
++				if ((i) % 4) {				      \
++					PPC_LI(b2p[TMP_REG_2], (i));	      \
++					PPC_STDX(r, base, b2p[TMP_REG_2]);    \
++				} else					      \
++					PPC_STD(r, base, i);		      \
++				} while(0)
++#define PPC_BPF_STLU(r, base, i) do { PPC_STDU(r, base, i); } while(0)
++
+ #define SEEN_FUNC	0x1000 /* might call external helpers */
+ #define SEEN_STACK	0x2000 /* uses BPF stack */
+ #define SEEN_SKB	0x4000 /* uses sk_buff */
+diff --git a/arch/powerpc/net/bpf_jit_comp64.c b/arch/powerpc/net/bpf_jit_comp64.c
+index fee1e1f8c9d3..3a21d3956ad4 100644
+--- a/arch/powerpc/net/bpf_jit_comp64.c
++++ b/arch/powerpc/net/bpf_jit_comp64.c
+@@ -261,7 +261,7 @@ static void bpf_jit_emit_tail_call(u32 *image, struct codegen_context *ctx, u32
+ 	 * if (tail_call_cnt > MAX_TAIL_CALL_CNT)
+ 	 *   goto out;
+ 	 */
+-	PPC_LD(b2p[TMP_REG_1], 1, bpf_jit_stack_tailcallcnt(ctx));
++	PPC_BPF_LL(b2p[TMP_REG_1], 1, bpf_jit_stack_tailcallcnt(ctx));
+ 	PPC_CMPLWI(b2p[TMP_REG_1], MAX_TAIL_CALL_CNT);
+ 	PPC_BCC(COND_GT, out);
+ 
+@@ -274,7 +274,7 @@ static void bpf_jit_emit_tail_call(u32 *image, struct codegen_context *ctx, u32
+ 	/* prog = array->ptrs[index]; */
+ 	PPC_MULI(b2p[TMP_REG_1], b2p_index, 8);
+ 	PPC_ADD(b2p[TMP_REG_1], b2p[TMP_REG_1], b2p_bpf_array);
+-	PPC_LD(b2p[TMP_REG_1], b2p[TMP_REG_1], offsetof(struct bpf_array, ptrs));
++	PPC_BPF_LL(b2p[TMP_REG_1], b2p[TMP_REG_1], offsetof(struct bpf_array, ptrs));
+ 
+ 	/*
+ 	 * if (prog == NULL)
+@@ -284,7 +284,7 @@ static void bpf_jit_emit_tail_call(u32 *image, struct codegen_context *ctx, u32
+ 	PPC_BCC(COND_EQ, out);
+ 
+ 	/* goto *(prog->bpf_func + prologue_size); */
+-	PPC_LD(b2p[TMP_REG_1], b2p[TMP_REG_1], offsetof(struct bpf_prog, bpf_func));
++	PPC_BPF_LL(b2p[TMP_REG_1], b2p[TMP_REG_1], offsetof(struct bpf_prog, bpf_func));
+ #ifdef PPC64_ELF_ABI_v1
+ 	/* skip past the function descriptor */
+ 	PPC_ADDI(b2p[TMP_REG_1], b2p[TMP_REG_1],
+@@ -616,7 +616,7 @@ bpf_alu32_trunc:
+ 				 * the instructions generated will remain the
+ 				 * same across all passes
+ 				 */
+-				PPC_STD(dst_reg, 1, bpf_jit_stack_local(ctx));
++				PPC_BPF_STL(dst_reg, 1, bpf_jit_stack_local(ctx));
+ 				PPC_ADDI(b2p[TMP_REG_1], 1, bpf_jit_stack_local(ctx));
+ 				PPC_LDBRX(dst_reg, 0, b2p[TMP_REG_1]);
+ 				break;
+@@ -672,7 +672,7 @@ emit_clear:
+ 				PPC_LI32(b2p[TMP_REG_1], imm);
+ 				src_reg = b2p[TMP_REG_1];
+ 			}
+-			PPC_STD(src_reg, dst_reg, off);
++			PPC_BPF_STL(src_reg, dst_reg, off);
+ 			break;
+ 
+ 		/*
+@@ -719,7 +719,7 @@ emit_clear:
+ 			break;
+ 		/* dst = *(u64 *)(ul) (src + off) */
+ 		case BPF_LDX | BPF_MEM | BPF_DW:
+-			PPC_LD(dst_reg, src_reg, off);
++			PPC_BPF_LL(dst_reg, src_reg, off);
+ 			break;
+ 
+ 		/*
+diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
+index fd143c934768..888aa9584e94 100644
+--- a/arch/powerpc/platforms/powernv/setup.c
++++ b/arch/powerpc/platforms/powernv/setup.c
+@@ -77,6 +77,12 @@ static void init_fw_feat_flags(struct device_node *np)
+ 	if (fw_feature_is("enabled", "fw-count-cache-disabled", np))
+ 		security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED);
+ 
++	if (fw_feature_is("enabled", "fw-count-cache-flush-bcctr2,0,0", np))
++		security_ftr_set(SEC_FTR_BCCTR_FLUSH_ASSIST);
++
++	if (fw_feature_is("enabled", "needs-count-cache-flush-on-context-switch", np))
++		security_ftr_set(SEC_FTR_FLUSH_COUNT_CACHE);
++
+ 	/*
+ 	 * The features below are enabled by default, so we instead look to see
+ 	 * if firmware has *disabled* them, and clear them if so.
+@@ -123,6 +129,7 @@ static void pnv_setup_rfi_flush(void)
+ 		  security_ftr_enabled(SEC_FTR_L1D_FLUSH_HV));
+ 
+ 	setup_rfi_flush(type, enable);
++	setup_count_cache_flush();
+ }
+ 
+ static void __init pnv_setup_arch(void)
+diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
+index 45f814041448..6a0ad56e89b9 100644
+--- a/arch/powerpc/platforms/pseries/setup.c
++++ b/arch/powerpc/platforms/pseries/setup.c
+@@ -484,6 +484,12 @@ static void init_cpu_char_feature_flags(struct h_cpu_char_result *result)
+ 	if (result->character & H_CPU_CHAR_COUNT_CACHE_DISABLED)
+ 		security_ftr_set(SEC_FTR_COUNT_CACHE_DISABLED);
+ 
++	if (result->character & H_CPU_CHAR_BCCTR_FLUSH_ASSIST)
++		security_ftr_set(SEC_FTR_BCCTR_FLUSH_ASSIST);
++
++	if (result->behaviour & H_CPU_BEHAV_FLUSH_COUNT_CACHE)
++		security_ftr_set(SEC_FTR_FLUSH_COUNT_CACHE);
++
+ 	/*
+ 	 * The features below are enabled by default, so we instead look to see
+ 	 * if firmware has *disabled* them, and clear them if so.
+@@ -534,6 +540,7 @@ void pseries_setup_rfi_flush(void)
+ 		 security_ftr_enabled(SEC_FTR_L1D_FLUSH_PR);
+ 
+ 	setup_rfi_flush(types, enable);
++	setup_count_cache_flush();
+ }
+ 
+ static void __init pSeries_setup_arch(void)
+diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
+index 4f393eb9745f..8fec1585ac7a 100644
+--- a/arch/x86/Kconfig
++++ b/arch/x86/Kconfig
+@@ -2139,14 +2139,8 @@ config RANDOMIZE_MEMORY_PHYSICAL_PADDING
+ 	   If unsure, leave at the default value.
+ 
+ config HOTPLUG_CPU
+-	bool "Support for hot-pluggable CPUs"
++	def_bool y
+ 	depends on SMP
+-	---help---
+-	  Say Y here to allow turning CPUs off and on. CPUs can be
+-	  controlled through /sys/devices/system/cpu.
+-	  ( Note: power management support will enable this option
+-	    automatically on SMP systems. )
+-	  Say N if you want to disable CPU hotplug.
+ 
+ config BOOTPARAM_HOTPLUG_CPU0
+ 	bool "Set default setting of cpu0_hotpluggable"
+diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
+index d2ae93faafe8..f9a4b85d7309 100644
+--- a/arch/x86/include/asm/kvm_host.h
++++ b/arch/x86/include/asm/kvm_host.h
+@@ -509,6 +509,7 @@ struct kvm_vcpu_arch {
+ 	bool tpr_access_reporting;
+ 	u64 ia32_xss;
+ 	u64 microcode_version;
++	u64 arch_capabilities;
+ 
+ 	/*
+ 	 * Paging state of the vcpu
+diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
+index 229d5e39f5c0..4bd878c9f7d2 100644
+--- a/arch/x86/kvm/vmx.c
++++ b/arch/x86/kvm/vmx.c
+@@ -740,7 +740,6 @@ struct vcpu_vmx {
+ 	u64 		      msr_guest_kernel_gs_base;
+ #endif
+ 
+-	u64 		      arch_capabilities;
+ 	u64 		      spec_ctrl;
+ 
+ 	u32 vm_entry_controls_shadow;
+@@ -3493,12 +3492,6 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
+ 
+ 		msr_info->data = to_vmx(vcpu)->spec_ctrl;
+ 		break;
+-	case MSR_IA32_ARCH_CAPABILITIES:
+-		if (!msr_info->host_initiated &&
+-		    !guest_cpuid_has(vcpu, X86_FEATURE_ARCH_CAPABILITIES))
+-			return 1;
+-		msr_info->data = to_vmx(vcpu)->arch_capabilities;
+-		break;
+ 	case MSR_IA32_SYSENTER_CS:
+ 		msr_info->data = vmcs_read32(GUEST_SYSENTER_CS);
+ 		break;
+@@ -3663,11 +3656,6 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
+ 		vmx_disable_intercept_for_msr(vmx->vmcs01.msr_bitmap, MSR_IA32_PRED_CMD,
+ 					      MSR_TYPE_W);
+ 		break;
+-	case MSR_IA32_ARCH_CAPABILITIES:
+-		if (!msr_info->host_initiated)
+-			return 1;
+-		vmx->arch_capabilities = data;
+-		break;
+ 	case MSR_IA32_CR_PAT:
+ 		if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
+ 			if (!kvm_mtrr_valid(vcpu, MSR_IA32_CR_PAT, data))
+@@ -5929,8 +5917,6 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
+ 		++vmx->nmsrs;
+ 	}
+ 
+-	vmx->arch_capabilities = kvm_get_arch_capabilities();
+-
+ 	vm_exit_controls_init(vmx, vmcs_config.vmexit_ctrl);
+ 
+ 	/* 22.2.1, 20.8.1 */
+diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
+index ce5b3dc348ce..5f85f17ffb75 100644
+--- a/arch/x86/kvm/x86.c
++++ b/arch/x86/kvm/x86.c
+@@ -2234,6 +2234,11 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
+ 		if (msr_info->host_initiated)
+ 			vcpu->arch.microcode_version = data;
+ 		break;
++	case MSR_IA32_ARCH_CAPABILITIES:
++		if (!msr_info->host_initiated)
++			return 1;
++		vcpu->arch.arch_capabilities = data;
++		break;
+ 	case MSR_EFER:
+ 		return set_efer(vcpu, data);
+ 	case MSR_K7_HWCR:
+@@ -2523,6 +2528,12 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
+ 	case MSR_IA32_UCODE_REV:
+ 		msr_info->data = vcpu->arch.microcode_version;
+ 		break;
++	case MSR_IA32_ARCH_CAPABILITIES:
++		if (!msr_info->host_initiated &&
++		    !guest_cpuid_has(vcpu, X86_FEATURE_ARCH_CAPABILITIES))
++			return 1;
++		msr_info->data = vcpu->arch.arch_capabilities;
++		break;
+ 	case MSR_MTRRcap:
+ 	case 0x200 ... 0x2ff:
+ 		return kvm_mtrr_get_msr(vcpu, msr_info->index, &msr_info->data);
+@@ -7918,6 +7929,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
+ {
+ 	int r;
+ 
++	vcpu->arch.arch_capabilities = kvm_get_arch_capabilities();
+ 	kvm_vcpu_mtrr_init(vcpu);
+ 	r = vcpu_load(vcpu);
+ 	if (r)
+diff --git a/drivers/gpio/gpio-adnp.c b/drivers/gpio/gpio-adnp.c
+index 89863ea25de1..ee923b1b820c 100644
+--- a/drivers/gpio/gpio-adnp.c
++++ b/drivers/gpio/gpio-adnp.c
+@@ -132,8 +132,10 @@ static int adnp_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+ 	if (err < 0)
+ 		goto out;
+ 
+-	if (err & BIT(pos))
+-		err = -EACCES;
++	if (value & BIT(pos)) {
++		err = -EPERM;
++		goto out;
++	}
+ 
+ 	err = 0;
+ 
+diff --git a/drivers/gpio/gpio-exar.c b/drivers/gpio/gpio-exar.c
+index 0ecd2369c2ca..a09d2f9ebacc 100644
+--- a/drivers/gpio/gpio-exar.c
++++ b/drivers/gpio/gpio-exar.c
+@@ -148,6 +148,8 @@ static int gpio_exar_probe(struct platform_device *pdev)
+ 	mutex_init(&exar_gpio->lock);
+ 
+ 	index = ida_simple_get(&ida_index, 0, 0, GFP_KERNEL);
++	if (index < 0)
++		goto err_destroy;
+ 
+ 	sprintf(exar_gpio->name, "exar_gpio%d", index);
+ 	exar_gpio->gpio_chip.label = exar_gpio->name;
+diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
+index 81c7ab10c083..aa592277d510 100644
+--- a/drivers/gpu/drm/vgem/vgem_drv.c
++++ b/drivers/gpu/drm/vgem/vgem_drv.c
+@@ -192,13 +192,9 @@ static struct drm_gem_object *vgem_gem_create(struct drm_device *dev,
+ 	ret = drm_gem_handle_create(file, &obj->base, handle);
+ 	drm_gem_object_put_unlocked(&obj->base);
+ 	if (ret)
+-		goto err;
++		return ERR_PTR(ret);
+ 
+ 	return &obj->base;
+-
+-err:
+-	__vgem_gem_destroy(obj);
+-	return ERR_PTR(ret);
+ }
+ 
+ static int vgem_gem_dumb_create(struct drm_file *file, struct drm_device *dev,
+diff --git a/drivers/isdn/hardware/mISDN/hfcmulti.c b/drivers/isdn/hardware/mISDN/hfcmulti.c
+index 3cf07b8ced1c..df01018acff1 100644
+--- a/drivers/isdn/hardware/mISDN/hfcmulti.c
++++ b/drivers/isdn/hardware/mISDN/hfcmulti.c
+@@ -4367,7 +4367,8 @@ setup_pci(struct hfc_multi *hc, struct pci_dev *pdev,
+ 	if (m->clock2)
+ 		test_and_set_bit(HFC_CHIP_CLOCK2, &hc->chip);
+ 
+-	if (ent->device == 0xB410) {
++	if (ent->vendor == PCI_VENDOR_ID_DIGIUM &&
++	    ent->device == PCI_DEVICE_ID_DIGIUM_HFC4S) {
+ 		test_and_set_bit(HFC_CHIP_B410P, &hc->chip);
+ 		test_and_set_bit(HFC_CHIP_PCM_MASTER, &hc->chip);
+ 		test_and_clear_bit(HFC_CHIP_PCM_SLAVE, &hc->chip);
+diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
+index 9645c8f05c7f..c3c9d7e33bd6 100644
+--- a/drivers/net/dsa/qca8k.c
++++ b/drivers/net/dsa/qca8k.c
+@@ -629,22 +629,6 @@ qca8k_adjust_link(struct dsa_switch *ds, int port, struct phy_device *phy)
+ 	qca8k_port_set_status(priv, port, 1);
+ }
+ 
+-static int
+-qca8k_phy_read(struct dsa_switch *ds, int phy, int regnum)
+-{
+-	struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
+-
+-	return mdiobus_read(priv->bus, phy, regnum);
+-}
+-
+-static int
+-qca8k_phy_write(struct dsa_switch *ds, int phy, int regnum, u16 val)
+-{
+-	struct qca8k_priv *priv = (struct qca8k_priv *)ds->priv;
+-
+-	return mdiobus_write(priv->bus, phy, regnum, val);
+-}
+-
+ static void
+ qca8k_get_strings(struct dsa_switch *ds, int port, uint8_t *data)
+ {
+@@ -879,8 +863,6 @@ static const struct dsa_switch_ops qca8k_switch_ops = {
+ 	.setup			= qca8k_setup,
+ 	.adjust_link            = qca8k_adjust_link,
+ 	.get_strings		= qca8k_get_strings,
+-	.phy_read		= qca8k_phy_read,
+-	.phy_write		= qca8k_phy_write,
+ 	.get_ethtool_stats	= qca8k_get_ethtool_stats,
+ 	.get_sset_count		= qca8k_get_sset_count,
+ 	.get_mac_eee		= qca8k_get_mac_eee,
+diff --git a/drivers/net/ethernet/8390/mac8390.c b/drivers/net/ethernet/8390/mac8390.c
+index 9497f18eaba0..e95a7567bb23 100644
+--- a/drivers/net/ethernet/8390/mac8390.c
++++ b/drivers/net/ethernet/8390/mac8390.c
+@@ -156,8 +156,6 @@ static void dayna_block_output(struct net_device *dev, int count,
+ #define memcpy_fromio(a, b, c)	memcpy((a), (void *)(b), (c))
+ #define memcpy_toio(a, b, c)	memcpy((void *)(a), (b), (c))
+ 
+-#define memcmp_withio(a, b, c)	memcmp((a), (void *)(b), (c))
+-
+ /* Slow Sane (16-bit chunk memory read/write) Cabletron uses this */
+ static void slow_sane_get_8390_hdr(struct net_device *dev,
+ 				   struct e8390_pkt_hdr *hdr, int ring_page);
+@@ -237,19 +235,26 @@ static enum mac8390_type __init mac8390_ident(struct nubus_dev *dev)
+ 
+ static enum mac8390_access __init mac8390_testio(volatile unsigned long membase)
+ {
+-	unsigned long outdata = 0xA5A0B5B0;
+-	unsigned long indata =  0x00000000;
++	u32 outdata = 0xA5A0B5B0;
++	u32 indata = 0;
++
+ 	/* Try writing 32 bits */
+-	memcpy_toio(membase, &outdata, 4);
+-	/* Now compare them */
+-	if (memcmp_withio(&outdata, membase, 4) == 0)
++	nubus_writel(outdata, membase);
++	/* Now read it back */
++	indata = nubus_readl(membase);
++	if (outdata == indata)
+ 		return ACCESS_32;
++
++	outdata = 0xC5C0D5D0;
++	indata = 0;
++
+ 	/* Write 16 bit output */
+ 	word_memcpy_tocard(membase, &outdata, 4);
+ 	/* Now read it back */
+ 	word_memcpy_fromcard(&indata, membase, 4);
+ 	if (outdata == indata)
+ 		return ACCESS_16;
++
+ 	return ACCESS_UNKNOWN;
+ }
+ 
+diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
+index 640babf752ea..784c3522aaa3 100644
+--- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
++++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.c
+@@ -270,11 +270,12 @@ int aq_ring_rx_clean(struct aq_ring_s *self,
+ 		} else {
+ 			if (buff->is_ip_cso) {
+ 				__skb_incr_checksum_unnecessary(skb);
+-				if (buff->is_udp_cso || buff->is_tcp_cso)
+-					__skb_incr_checksum_unnecessary(skb);
+ 			} else {
+ 				skb->ip_summed = CHECKSUM_NONE;
+ 			}
++
++			if (buff->is_udp_cso || buff->is_tcp_cso)
++				__skb_incr_checksum_unnecessary(skb);
+ 		}
+ 
+ 		skb_set_hash(skb, buff->rss_hash,
+diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
+index 09494e1c77c5..7ad1d56d8389 100644
+--- a/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
++++ b/drivers/net/ethernet/cavium/thunder/nicvf_queues.c
+@@ -105,20 +105,19 @@ static inline struct pgcache *nicvf_alloc_page(struct nicvf *nic,
+ 	/* Check if page can be recycled */
+ 	if (page) {
+ 		ref_count = page_ref_count(page);
+-		/* Check if this page has been used once i.e 'put_page'
+-		 * called after packet transmission i.e internal ref_count
+-		 * and page's ref_count are equal i.e page can be recycled.
++		/* This page can be recycled if internal ref_count and page's
++		 * ref_count are equal, indicating that the page has been used
++		 * once for packet transmission. For non-XDP mode, internal
++		 * ref_count is always '1'.
+ 		 */
+-		if (rbdr->is_xdp && (ref_count == pgcache->ref_count))
+-			pgcache->ref_count--;
+-		else
+-			page = NULL;
+-
+-		/* In non-XDP mode, page's ref_count needs to be '1' for it
+-		 * to be recycled.
+-		 */
+-		if (!rbdr->is_xdp && (ref_count != 1))
++		if (rbdr->is_xdp) {
++			if (ref_count == pgcache->ref_count)
++				pgcache->ref_count--;
++			else
++				page = NULL;
++		} else if (ref_count != 1) {
+ 			page = NULL;
++		}
+ 	}
+ 
+ 	if (!page) {
+@@ -365,11 +364,10 @@ static void nicvf_free_rbdr(struct nicvf *nic, struct rbdr *rbdr)
+ 	while (head < rbdr->pgcnt) {
+ 		pgcache = &rbdr->pgcache[head];
+ 		if (pgcache->page && page_ref_count(pgcache->page) != 0) {
+-			if (!rbdr->is_xdp) {
+-				put_page(pgcache->page);
+-				continue;
++			if (rbdr->is_xdp) {
++				page_ref_sub(pgcache->page,
++					     pgcache->ref_count - 1);
+ 			}
+-			page_ref_sub(pgcache->page, pgcache->ref_count - 1);
+ 			put_page(pgcache->page);
+ 		}
+ 		head++;
+diff --git a/drivers/net/ethernet/stmicro/stmmac/ring_mode.c b/drivers/net/ethernet/stmicro/stmmac/ring_mode.c
+index 1af7b078b94d..d4c3bf78d928 100644
+--- a/drivers/net/ethernet/stmicro/stmmac/ring_mode.c
++++ b/drivers/net/ethernet/stmicro/stmmac/ring_mode.c
+@@ -114,10 +114,11 @@ static unsigned int stmmac_is_jumbo_frm(int len, int enh_desc)
+ 
+ static void stmmac_refill_desc3(void *priv_ptr, struct dma_desc *p)
+ {
+-	struct stmmac_priv *priv = (struct stmmac_priv *)priv_ptr;
++	struct stmmac_rx_queue *rx_q = priv_ptr;
++	struct stmmac_priv *priv = rx_q->priv_data;
+ 
+ 	/* Fill DES3 in case of RING mode */
+-	if (priv->dma_buf_sz >= BUF_SIZE_8KiB)
++	if (priv->dma_buf_sz == BUF_SIZE_16KiB)
+ 		p->des3 = cpu_to_le32(le32_to_cpu(p->des2) + BUF_SIZE_8KiB);
+ }
+ 
+diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+index 0cc83e8417ef..4a9dbee6f054 100644
+--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
++++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+@@ -3787,6 +3787,20 @@ static int stmmac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+ 	return ret;
+ }
+ 
++static int stmmac_set_mac_address(struct net_device *ndev, void *addr)
++{
++	struct stmmac_priv *priv = netdev_priv(ndev);
++	int ret = 0;
++
++	ret = eth_mac_addr(ndev, addr);
++	if (ret)
++		return ret;
++
++	priv->hw->mac->set_umac_addr(priv->hw, ndev->dev_addr, 0);
++
++	return ret;
++}
++
+ #ifdef CONFIG_DEBUG_FS
+ static struct dentry *stmmac_fs_dir;
+ 
+@@ -4014,7 +4028,7 @@ static const struct net_device_ops stmmac_netdev_ops = {
+ #ifdef CONFIG_NET_POLL_CONTROLLER
+ 	.ndo_poll_controller = stmmac_poll_controller,
+ #endif
+-	.ndo_set_mac_address = eth_mac_addr,
++	.ndo_set_mac_address = stmmac_set_mac_address,
+ };
+ 
+ /**
+diff --git a/drivers/net/tun.c b/drivers/net/tun.c
+index 4227ee33ef19..3b13d9e4030a 100644
+--- a/drivers/net/tun.c
++++ b/drivers/net/tun.c
+@@ -1403,9 +1403,6 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
+ 	u32 rxhash;
+ 	int skb_xdp = 1;
+ 
+-	if (!(tun->dev->flags & IFF_UP))
+-		return -EIO;
+-
+ 	if (!(tun->flags & IFF_NO_PI)) {
+ 		if (len < sizeof(pi))
+ 			return -EINVAL;
+@@ -1493,9 +1490,11 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
+ 			err = skb_copy_datagram_from_iter(skb, 0, from, len);
+ 
+ 		if (err) {
++			err = -EFAULT;
++drop:
+ 			this_cpu_inc(tun->pcpu_stats->rx_dropped);
+ 			kfree_skb(skb);
+-			return -EFAULT;
++			return err;
+ 		}
+ 	}
+ 
+@@ -1566,11 +1565,20 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
+ 	}
+ 
+ 	rxhash = __skb_get_hash_symmetric(skb);
++
++	rcu_read_lock();
++	if (unlikely(!(tun->dev->flags & IFF_UP))) {
++		err = -EIO;
++		rcu_read_unlock();
++		goto drop;
++	}
++
+ #ifndef CONFIG_4KSTACKS
+ 	tun_rx_batched(tun, tfile, skb, more);
+ #else
+ 	netif_rx_ni(skb);
+ #endif
++	rcu_read_unlock();
+ 
+ 	stats = get_cpu_ptr(tun->pcpu_stats);
+ 	u64_stats_update_begin(&stats->syncp);
+diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
+index df48f65c4f90..2fbaa279988e 100644
+--- a/drivers/net/vxlan.c
++++ b/drivers/net/vxlan.c
+@@ -3793,10 +3793,8 @@ static void __net_exit vxlan_exit_net(struct net *net)
+ 		/* If vxlan->dev is in the same netns, it has already been added
+ 		 * to the list by the previous loop.
+ 		 */
+-		if (!net_eq(dev_net(vxlan->dev), net)) {
+-			gro_cells_destroy(&vxlan->gro_cells);
++		if (!net_eq(dev_net(vxlan->dev), net))
+ 			unregister_netdevice_queue(vxlan->dev, &list);
+-		}
+ 	}
+ 
+ 	unregister_netdevice_many(&list);
+diff --git a/drivers/phy/allwinner/phy-sun4i-usb.c b/drivers/phy/allwinner/phy-sun4i-usb.c
+index d1ccff527756..4d34dfb64998 100644
+--- a/drivers/phy/allwinner/phy-sun4i-usb.c
++++ b/drivers/phy/allwinner/phy-sun4i-usb.c
+@@ -480,8 +480,11 @@ static int sun4i_usb_phy_set_mode(struct phy *_phy, enum phy_mode mode)
+ 	struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
+ 	int new_mode;
+ 
+-	if (phy->index != 0)
++	if (phy->index != 0) {
++		if (mode == PHY_MODE_USB_HOST)
++			return 0;
+ 		return -EINVAL;
++	}
+ 
+ 	switch (mode) {
+ 	case PHY_MODE_USB_HOST:
+diff --git a/drivers/s390/cio/vfio_ccw_drv.c b/drivers/s390/cio/vfio_ccw_drv.c
+index ae7a49ade414..d22759eb6640 100644
+--- a/drivers/s390/cio/vfio_ccw_drv.c
++++ b/drivers/s390/cio/vfio_ccw_drv.c
+@@ -70,20 +70,24 @@ static void vfio_ccw_sch_io_todo(struct work_struct *work)
+ {
+ 	struct vfio_ccw_private *private;
+ 	struct irb *irb;
++	bool is_final;
+ 
+ 	private = container_of(work, struct vfio_ccw_private, io_work);
+ 	irb = &private->irb;
+ 
++	is_final = !(scsw_actl(&irb->scsw) &
++		     (SCSW_ACTL_DEVACT | SCSW_ACTL_SCHACT));
+ 	if (scsw_is_solicited(&irb->scsw)) {
+ 		cp_update_scsw(&private->cp, &irb->scsw);
+-		cp_free(&private->cp);
++		if (is_final)
++			cp_free(&private->cp);
+ 	}
+ 	memcpy(private->io_region.irb_area, irb, sizeof(*irb));
+ 
+ 	if (private->io_trigger)
+ 		eventfd_signal(private->io_trigger, 1);
+ 
+-	if (private->mdev)
++	if (private->mdev && is_final)
+ 		private->state = VFIO_CCW_STATE_IDLE;
+ }
+ 
+diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c
+index 7aa243a6cdbf..6d5065f679ac 100644
+--- a/drivers/s390/scsi/zfcp_erp.c
++++ b/drivers/s390/scsi/zfcp_erp.c
+@@ -652,6 +652,20 @@ static void zfcp_erp_strategy_memwait(struct zfcp_erp_action *erp_action)
+ 	add_timer(&erp_action->timer);
+ }
+ 
++void zfcp_erp_port_forced_reopen_all(struct zfcp_adapter *adapter,
++				     int clear, char *dbftag)
++{
++	unsigned long flags;
++	struct zfcp_port *port;
++
++	write_lock_irqsave(&adapter->erp_lock, flags);
++	read_lock(&adapter->port_list_lock);
++	list_for_each_entry(port, &adapter->port_list, list)
++		_zfcp_erp_port_forced_reopen(port, clear, dbftag);
++	read_unlock(&adapter->port_list_lock);
++	write_unlock_irqrestore(&adapter->erp_lock, flags);
++}
++
+ static void _zfcp_erp_port_reopen_all(struct zfcp_adapter *adapter,
+ 				      int clear, char *id)
+ {
+@@ -1306,6 +1320,9 @@ static void zfcp_erp_try_rport_unblock(struct zfcp_port *port)
+ 		struct zfcp_scsi_dev *zsdev = sdev_to_zfcp(sdev);
+ 		int lun_status;
+ 
++		if (sdev->sdev_state == SDEV_DEL ||
++		    sdev->sdev_state == SDEV_CANCEL)
++			continue;
+ 		if (zsdev->port != port)
+ 			continue;
+ 		/* LUN under port of interest */
+diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h
+index c1092a11e728..1b2e2541b1de 100644
+--- a/drivers/s390/scsi/zfcp_ext.h
++++ b/drivers/s390/scsi/zfcp_ext.h
+@@ -68,6 +68,8 @@ extern void zfcp_erp_clear_port_status(struct zfcp_port *, u32);
+ extern int  zfcp_erp_port_reopen(struct zfcp_port *, int, char *);
+ extern void zfcp_erp_port_shutdown(struct zfcp_port *, int, char *);
+ extern void zfcp_erp_port_forced_reopen(struct zfcp_port *, int, char *);
++extern void zfcp_erp_port_forced_reopen_all(struct zfcp_adapter *adapter,
++					    int clear, char *dbftag);
+ extern void zfcp_erp_set_lun_status(struct scsi_device *, u32);
+ extern void zfcp_erp_clear_lun_status(struct scsi_device *, u32);
+ extern void zfcp_erp_lun_reopen(struct scsi_device *, int, char *);
+diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c
+index 0b6f51424745..6f6bc73a3a10 100644
+--- a/drivers/s390/scsi/zfcp_scsi.c
++++ b/drivers/s390/scsi/zfcp_scsi.c
+@@ -327,6 +327,10 @@ static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
+ 	struct zfcp_adapter *adapter = zfcp_sdev->port->adapter;
+ 	int ret = SUCCESS, fc_ret;
+ 
++	if (!(adapter->connection_features & FSF_FEATURE_NPIV_MODE)) {
++		zfcp_erp_port_forced_reopen_all(adapter, 0, "schrh_p");
++		zfcp_erp_wait(adapter);
++	}
+ 	zfcp_erp_adapter_reopen(adapter, 0, "schrh_1");
+ 	zfcp_erp_wait(adapter);
+ 	fc_ret = fc_block_scsi_eh(scpnt);
+diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
+index d0cc8fb40f63..e0c0fea227c1 100644
+--- a/drivers/scsi/sd.c
++++ b/drivers/scsi/sd.c
+@@ -1420,11 +1420,6 @@ static void sd_release(struct gendisk *disk, fmode_t mode)
+ 			scsi_set_medium_removal(sdev, SCSI_REMOVAL_ALLOW);
+ 	}
+ 
+-	/*
+-	 * XXX and what if there are packets in flight and this close()
+-	 * XXX is followed by a "rmmod sd_mod"?
+-	 */
+-
+ 	scsi_disk_put(sdkp);
+ }
+ 
+@@ -3089,6 +3084,9 @@ static bool sd_validate_opt_xfer_size(struct scsi_disk *sdkp,
+ 	unsigned int opt_xfer_bytes =
+ 		logical_to_bytes(sdp, sdkp->opt_xfer_blocks);
+ 
++	if (sdkp->opt_xfer_blocks == 0)
++		return false;
++
+ 	if (sdkp->opt_xfer_blocks > dev_max) {
+ 		sd_first_printk(KERN_WARNING, sdkp,
+ 				"Optimal transfer size %u logical blocks " \
+@@ -3521,11 +3519,23 @@ static void scsi_disk_release(struct device *dev)
+ {
+ 	struct scsi_disk *sdkp = to_scsi_disk(dev);
+ 	struct gendisk *disk = sdkp->disk;
+-	
++	struct request_queue *q = disk->queue;
++
+ 	spin_lock(&sd_index_lock);
+ 	ida_remove(&sd_index_ida, sdkp->index);
+ 	spin_unlock(&sd_index_lock);
+ 
++	/*
++	 * Wait until all requests that are in progress have completed.
++	 * This is necessary to avoid that e.g. scsi_end_request() crashes
++	 * due to clearing the disk->private_data pointer. Wait from inside
++	 * scsi_disk_release() instead of from sd_release() to avoid that
++	 * freezing and unfreezing the request queue affects user space I/O
++	 * in case multiple processes open a /dev/sd... node concurrently.
++	 */
++	blk_mq_freeze_queue(q);
++	blk_mq_unfreeze_queue(q);
++
+ 	disk->private_data = NULL;
+ 	put_disk(disk);
+ 	put_device(&sdkp->device->sdev_gendev);
+diff --git a/drivers/staging/comedi/comedidev.h b/drivers/staging/comedi/comedidev.h
+index 1bb9986f865e..33f249af0063 100644
+--- a/drivers/staging/comedi/comedidev.h
++++ b/drivers/staging/comedi/comedidev.h
+@@ -992,6 +992,8 @@ int comedi_dio_insn_config(struct comedi_device *dev,
+ 			   unsigned int mask);
+ unsigned int comedi_dio_update_state(struct comedi_subdevice *s,
+ 				     unsigned int *data);
++unsigned int comedi_bytes_per_scan_cmd(struct comedi_subdevice *s,
++				       struct comedi_cmd *cmd);
+ unsigned int comedi_bytes_per_scan(struct comedi_subdevice *s);
+ unsigned int comedi_nscans_left(struct comedi_subdevice *s,
+ 				unsigned int nscans);
+diff --git a/drivers/staging/comedi/drivers.c b/drivers/staging/comedi/drivers.c
+index c11c22bd6d13..2e532219f08b 100644
+--- a/drivers/staging/comedi/drivers.c
++++ b/drivers/staging/comedi/drivers.c
+@@ -390,11 +390,13 @@ unsigned int comedi_dio_update_state(struct comedi_subdevice *s,
+ EXPORT_SYMBOL_GPL(comedi_dio_update_state);
+ 
+ /**
+- * comedi_bytes_per_scan() - Get length of asynchronous command "scan" in bytes
++ * comedi_bytes_per_scan_cmd() - Get length of asynchronous command "scan" in
++ * bytes
+  * @s: COMEDI subdevice.
++ * @cmd: COMEDI command.
+  *
+  * Determines the overall scan length according to the subdevice type and the
+- * number of channels in the scan.
++ * number of channels in the scan for the specified command.
+  *
+  * For digital input, output or input/output subdevices, samples for
+  * multiple channels are assumed to be packed into one or more unsigned
+@@ -404,9 +406,9 @@ EXPORT_SYMBOL_GPL(comedi_dio_update_state);
+  *
+  * Returns the overall scan length in bytes.
+  */
+-unsigned int comedi_bytes_per_scan(struct comedi_subdevice *s)
++unsigned int comedi_bytes_per_scan_cmd(struct comedi_subdevice *s,
++				       struct comedi_cmd *cmd)
+ {
+-	struct comedi_cmd *cmd = &s->async->cmd;
+ 	unsigned int num_samples;
+ 	unsigned int bits_per_sample;
+ 
+@@ -423,6 +425,29 @@ unsigned int comedi_bytes_per_scan(struct comedi_subdevice *s)
+ 	}
+ 	return comedi_samples_to_bytes(s, num_samples);
+ }
++EXPORT_SYMBOL_GPL(comedi_bytes_per_scan_cmd);
++
++/**
++ * comedi_bytes_per_scan() - Get length of asynchronous command "scan" in bytes
++ * @s: COMEDI subdevice.
++ *
++ * Determines the overall scan length according to the subdevice type and the
++ * number of channels in the scan for the current command.
++ *
++ * For digital input, output or input/output subdevices, samples for
++ * multiple channels are assumed to be packed into one or more unsigned
++ * short or unsigned int values according to the subdevice's %SDF_LSAMPL
++ * flag.  For other types of subdevice, samples are assumed to occupy a
++ * whole unsigned short or unsigned int according to the %SDF_LSAMPL flag.
++ *
++ * Returns the overall scan length in bytes.
++ */
++unsigned int comedi_bytes_per_scan(struct comedi_subdevice *s)
++{
++	struct comedi_cmd *cmd = &s->async->cmd;
++
++	return comedi_bytes_per_scan_cmd(s, cmd);
++}
+ EXPORT_SYMBOL_GPL(comedi_bytes_per_scan);
+ 
+ static unsigned int __comedi_nscans_left(struct comedi_subdevice *s,
+diff --git a/drivers/staging/comedi/drivers/ni_mio_common.c b/drivers/staging/comedi/drivers/ni_mio_common.c
+index 158f3e83efb6..36361bdf934a 100644
+--- a/drivers/staging/comedi/drivers/ni_mio_common.c
++++ b/drivers/staging/comedi/drivers/ni_mio_common.c
+@@ -3523,6 +3523,7 @@ static int ni_cdio_check_chanlist(struct comedi_device *dev,
+ static int ni_cdio_cmdtest(struct comedi_device *dev,
+ 			   struct comedi_subdevice *s, struct comedi_cmd *cmd)
+ {
++	unsigned int bytes_per_scan;
+ 	int err = 0;
+ 	int tmp;
+ 
+@@ -3552,9 +3553,12 @@ static int ni_cdio_cmdtest(struct comedi_device *dev,
+ 	err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
+ 	err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
+ 					   cmd->chanlist_len);
+-	err |= comedi_check_trigger_arg_max(&cmd->stop_arg,
+-					    s->async->prealloc_bufsz /
+-					    comedi_bytes_per_scan(s));
++	bytes_per_scan = comedi_bytes_per_scan_cmd(s, cmd);
++	if (bytes_per_scan) {
++		err |= comedi_check_trigger_arg_max(&cmd->stop_arg,
++						    s->async->prealloc_bufsz /
++						    bytes_per_scan);
++	}
+ 
+ 	if (err)
+ 		return 3;
+diff --git a/drivers/staging/vt6655/device_main.c b/drivers/staging/vt6655/device_main.c
+index 1123b4f1e1d6..84a915199e64 100644
+--- a/drivers/staging/vt6655/device_main.c
++++ b/drivers/staging/vt6655/device_main.c
+@@ -973,8 +973,6 @@ static void vnt_interrupt_process(struct vnt_private *priv)
+ 		return;
+ 	}
+ 
+-	MACvIntDisable(priv->PortOffset);
+-
+ 	spin_lock_irqsave(&priv->lock, flags);
+ 
+ 	/* Read low level stats */
+@@ -1062,8 +1060,6 @@ static void vnt_interrupt_process(struct vnt_private *priv)
+ 	}
+ 
+ 	spin_unlock_irqrestore(&priv->lock, flags);
+-
+-	MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE);
+ }
+ 
+ static void vnt_interrupt_work(struct work_struct *work)
+@@ -1073,14 +1069,17 @@ static void vnt_interrupt_work(struct work_struct *work)
+ 
+ 	if (priv->vif)
+ 		vnt_interrupt_process(priv);
++
++	MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE);
+ }
+ 
+ static irqreturn_t vnt_interrupt(int irq,  void *arg)
+ {
+ 	struct vnt_private *priv = arg;
+ 
+-	if (priv->vif)
+-		schedule_work(&priv->interrupt_work);
++	schedule_work(&priv->interrupt_work);
++
++	MACvIntDisable(priv->PortOffset);
+ 
+ 	return IRQ_HANDLED;
+ }
+diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
+index 2286e9d73115..9f1cef59fa28 100644
+--- a/drivers/tty/serial/atmel_serial.c
++++ b/drivers/tty/serial/atmel_serial.c
+@@ -1163,6 +1163,10 @@ static int atmel_prepare_rx_dma(struct uart_port *port)
+ 					 sg_dma_len(&atmel_port->sg_rx)/2,
+ 					 DMA_DEV_TO_MEM,
+ 					 DMA_PREP_INTERRUPT);
++	if (!desc) {
++		dev_err(port->dev, "Preparing DMA cyclic failed\n");
++		goto chan_err;
++	}
+ 	desc->callback = atmel_complete_rx_dma;
+ 	desc->callback_param = port;
+ 	atmel_port->desc_rx = desc;
+diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c
+index f2b0d8cee8ef..0314e78e31ff 100644
+--- a/drivers/tty/serial/kgdboc.c
++++ b/drivers/tty/serial/kgdboc.c
+@@ -148,8 +148,10 @@ static int configure_kgdboc(void)
+ 	char *cptr = config;
+ 	struct console *cons;
+ 
+-	if (!strlen(config) || isspace(config[0]))
++	if (!strlen(config) || isspace(config[0])) {
++		err = 0;
+ 		goto noconfig;
++	}
+ 
+ 	kgdboc_io_ops.is_console = 0;
+ 	kgdb_tty_driver = NULL;
+diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c
+index 9dfedbe6c071..54660002271a 100644
+--- a/drivers/tty/serial/max310x.c
++++ b/drivers/tty/serial/max310x.c
+@@ -1323,6 +1323,8 @@ static int max310x_spi_probe(struct spi_device *spi)
+ 	if (spi->dev.of_node) {
+ 		const struct of_device_id *of_id =
+ 			of_match_device(max310x_dt_ids, &spi->dev);
++		if (!of_id)
++			return -ENODEV;
+ 
+ 		devtype = (struct max310x_devtype *)of_id->data;
+ 	} else {
+diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c
+index 37dba940d898..d5f933ec153c 100644
+--- a/drivers/tty/serial/sh-sci.c
++++ b/drivers/tty/serial/sh-sci.c
+@@ -806,19 +806,9 @@ static void sci_transmit_chars(struct uart_port *port)
+ 
+ 	if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+ 		uart_write_wakeup(port);
+-	if (uart_circ_empty(xmit)) {
++	if (uart_circ_empty(xmit))
+ 		sci_stop_tx(port);
+-	} else {
+-		ctrl = serial_port_in(port, SCSCR);
+-
+-		if (port->type != PORT_SCI) {
+-			serial_port_in(port, SCxSR); /* Dummy read */
+-			sci_clear_SCxSR(port, SCxSR_TDxE_CLEAR(port));
+-		}
+ 
+-		ctrl |= SCSCR_TIE;
+-		serial_port_out(port, SCSCR, ctrl);
+-	}
+ }
+ 
+ /* On SH3, SCIF may read end-of-break as a space->mark char */
+diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
+index 8ab0195f8d32..f736c8895089 100644
+--- a/drivers/usb/class/cdc-acm.c
++++ b/drivers/usb/class/cdc-acm.c
+@@ -570,10 +570,8 @@ static void acm_softint(struct work_struct *work)
+ 		clear_bit(EVENT_RX_STALL, &acm->flags);
+ 	}
+ 
+-	if (test_bit(EVENT_TTY_WAKEUP, &acm->flags)) {
++	if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags))
+ 		tty_port_tty_wakeup(&acm->port);
+-		clear_bit(EVENT_TTY_WAKEUP, &acm->flags);
+-	}
+ }
+ 
+ /*
+diff --git a/drivers/usb/common/common.c b/drivers/usb/common/common.c
+index 552ff7ac5a6b..c1ab14145f62 100644
+--- a/drivers/usb/common/common.c
++++ b/drivers/usb/common/common.c
+@@ -148,6 +148,8 @@ enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0)
+ 
+ 	do {
+ 		controller = of_find_node_with_property(controller, "phys");
++		if (!of_device_is_available(controller))
++			continue;
+ 		index = 0;
+ 		do {
+ 			if (arg0 == -1) {
+diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
+index 1a6ccdd5a5fc..bd749e78df59 100644
+--- a/drivers/usb/core/config.c
++++ b/drivers/usb/core/config.c
+@@ -768,21 +768,18 @@ void usb_destroy_configuration(struct usb_device *dev)
+ 		return;
+ 
+ 	if (dev->rawdescriptors) {
+-		for (i = 0; i < dev->descriptor.bNumConfigurations &&
+-				i < USB_MAXCONFIG; i++)
++		for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
+ 			kfree(dev->rawdescriptors[i]);
+ 
+ 		kfree(dev->rawdescriptors);
+ 		dev->rawdescriptors = NULL;
+ 	}
+ 
+-	for (c = 0; c < dev->descriptor.bNumConfigurations &&
+-			c < USB_MAXCONFIG; c++) {
++	for (c = 0; c < dev->descriptor.bNumConfigurations; c++) {
+ 		struct usb_host_config *cf = &dev->config[c];
+ 
+ 		kfree(cf->string);
+-		for (i = 0; i < cf->desc.bNumInterfaces &&
+-				i < USB_MAXINTERFACES; i++) {
++		for (i = 0; i < cf->desc.bNumInterfaces; i++) {
+ 			if (cf->intf_cache[i])
+ 				kref_put(&cf->intf_cache[i]->ref,
+ 					  usb_release_interface_cache);
+diff --git a/drivers/usb/gadget/function/f_hid.c b/drivers/usb/gadget/function/f_hid.c
+index d8e359ef6eb1..63f6e344d5b0 100644
+--- a/drivers/usb/gadget/function/f_hid.c
++++ b/drivers/usb/gadget/function/f_hid.c
+@@ -395,20 +395,20 @@ try_again:
+ 	req->complete = f_hidg_req_complete;
+ 	req->context  = hidg;
+ 
++	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
++
+ 	status = usb_ep_queue(hidg->in_ep, req, GFP_ATOMIC);
+ 	if (status < 0) {
+ 		ERROR(hidg->func.config->cdev,
+ 			"usb_ep_queue error on int endpoint %zd\n", status);
+-		goto release_write_pending_unlocked;
++		goto release_write_pending;
+ 	} else {
+ 		status = count;
+ 	}
+-	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
+ 
+ 	return status;
+ release_write_pending:
+ 	spin_lock_irqsave(&hidg->write_spinlock, flags);
+-release_write_pending_unlocked:
+ 	hidg->write_pending = 0;
+ 	spin_unlock_irqrestore(&hidg->write_spinlock, flags);
+ 
+diff --git a/drivers/usb/host/xhci-rcar.c b/drivers/usb/host/xhci-rcar.c
+index 97f23cc31f4c..425c2edfd6ea 100644
+--- a/drivers/usb/host/xhci-rcar.c
++++ b/drivers/usb/host/xhci-rcar.c
+@@ -236,6 +236,7 @@ int xhci_rcar_init_quirk(struct usb_hcd *hcd)
+ 			xhci_rcar_is_gen3(hcd->self.controller))
+ 		xhci->quirks |= XHCI_NO_64BIT_SUPPORT;
+ 
++	xhci->quirks |= XHCI_TRUST_TX_LENGTH;
+ 	return xhci_rcar_download_firmware(hcd);
+ }
+ 
+diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
+index aa230706b875..9a7e77a09080 100644
+--- a/drivers/usb/host/xhci-ring.c
++++ b/drivers/usb/host/xhci-ring.c
+@@ -1715,10 +1715,13 @@ static void handle_port_status(struct xhci_hcd *xhci,
+ 		}
+ 	}
+ 
+-	if ((portsc & PORT_PLC) && (portsc & PORT_PLS_MASK) == XDEV_U0 &&
+-			DEV_SUPERSPEED_ANY(portsc)) {
++	if ((portsc & PORT_PLC) &&
++	    DEV_SUPERSPEED_ANY(portsc) &&
++	    ((portsc & PORT_PLS_MASK) == XDEV_U0 ||
++	     (portsc & PORT_PLS_MASK) == XDEV_U1 ||
++	     (portsc & PORT_PLS_MASK) == XDEV_U2)) {
+ 		xhci_dbg(xhci, "resume SS port %d finished\n", port_id);
+-		/* We've just brought the device into U0 through either the
++		/* We've just brought the device into U0/1/2 through either the
+ 		 * Resume state after a device remote wakeup, or through the
+ 		 * U3Exit state after a host-initiated resume.  If it's a device
+ 		 * initiated remote wake, don't pass up the link state change,
+diff --git a/drivers/usb/mtu3/Kconfig b/drivers/usb/mtu3/Kconfig
+index 25cd61947bee..a213ce94f6eb 100644
+--- a/drivers/usb/mtu3/Kconfig
++++ b/drivers/usb/mtu3/Kconfig
+@@ -4,6 +4,7 @@ config USB_MTU3
+ 	tristate "MediaTek USB3 Dual Role controller"
+ 	depends on EXTCON && (USB || USB_GADGET) && HAS_DMA
+ 	depends on ARCH_MEDIATEK || COMPILE_TEST
++	depends on EXTCON || !EXTCON
+ 	select USB_XHCI_MTK if USB_SUPPORT && USB_XHCI_HCD
+ 	help
+ 	  Say Y or M here if your system runs on MediaTek SoCs with
+diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c
+index d8e6790ccffe..98e466c3cfca 100644
+--- a/drivers/usb/serial/cp210x.c
++++ b/drivers/usb/serial/cp210x.c
+@@ -83,6 +83,7 @@ static const struct usb_device_id id_table[] = {
+ 	{ USB_DEVICE(0x10C4, 0x804E) }, /* Software Bisque Paramount ME build-in converter */
+ 	{ USB_DEVICE(0x10C4, 0x8053) }, /* Enfora EDG1228 */
+ 	{ USB_DEVICE(0x10C4, 0x8054) }, /* Enfora GSM2228 */
++	{ USB_DEVICE(0x10C4, 0x8056) }, /* Lorenz Messtechnik devices */
+ 	{ USB_DEVICE(0x10C4, 0x8066) }, /* Argussoft In-System Programmer */
+ 	{ USB_DEVICE(0x10C4, 0x806F) }, /* IMS USB to RS422 Converter Cable */
+ 	{ USB_DEVICE(0x10C4, 0x807A) }, /* Crumb128 board */
+diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
+index d45a2c352c98..e76395d7f17d 100644
+--- a/drivers/usb/serial/ftdi_sio.c
++++ b/drivers/usb/serial/ftdi_sio.c
+@@ -604,6 +604,8 @@ static const struct usb_device_id id_table_combined[] = {
+ 		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
+ 	{ USB_DEVICE(FTDI_VID, FTDI_NT_ORIONLXM_PID),
+ 		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
++	{ USB_DEVICE(FTDI_VID, FTDI_NT_ORIONLX_PLUS_PID) },
++	{ USB_DEVICE(FTDI_VID, FTDI_NT_ORION_IO_PID) },
+ 	{ USB_DEVICE(FTDI_VID, FTDI_SYNAPSE_SS200_PID) },
+ 	{ USB_DEVICE(FTDI_VID, FTDI_CUSTOMWARE_MINIPLEX_PID) },
+ 	{ USB_DEVICE(FTDI_VID, FTDI_CUSTOMWARE_MINIPLEX2_PID) },
+diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
+index b863bedb55a1..5755f0df0025 100644
+--- a/drivers/usb/serial/ftdi_sio_ids.h
++++ b/drivers/usb/serial/ftdi_sio_ids.h
+@@ -567,7 +567,9 @@
+ /*
+  * NovaTech product ids (FTDI_VID)
+  */
+-#define FTDI_NT_ORIONLXM_PID	0x7c90	/* OrionLXm Substation Automation Platform */
++#define FTDI_NT_ORIONLXM_PID		0x7c90	/* OrionLXm Substation Automation Platform */
++#define FTDI_NT_ORIONLX_PLUS_PID	0x7c91	/* OrionLX+ Substation Automation Platform */
++#define FTDI_NT_ORION_IO_PID		0x7c92	/* Orion I/O */
+ 
+ /*
+  * Synapse Wireless product ids (FTDI_VID)
+diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
+index a453965f9e9a..393a91ab56ed 100644
+--- a/drivers/usb/serial/mos7720.c
++++ b/drivers/usb/serial/mos7720.c
+@@ -368,8 +368,6 @@ static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport,
+ 	if (!urbtrack)
+ 		return -ENOMEM;
+ 
+-	kref_get(&mos_parport->ref_count);
+-	urbtrack->mos_parport = mos_parport;
+ 	urbtrack->urb = usb_alloc_urb(0, GFP_ATOMIC);
+ 	if (!urbtrack->urb) {
+ 		kfree(urbtrack);
+@@ -390,6 +388,8 @@ static int write_parport_reg_nonblock(struct mos7715_parport *mos_parport,
+ 			     usb_sndctrlpipe(usbdev, 0),
+ 			     (unsigned char *)urbtrack->setup,
+ 			     NULL, 0, async_complete, urbtrack);
++	kref_get(&mos_parport->ref_count);
++	urbtrack->mos_parport = mos_parport;
+ 	kref_init(&urbtrack->ref_count);
+ 	INIT_LIST_HEAD(&urbtrack->urblist_entry);
+ 
+diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
+index bf72245f1cea..3311f569aa17 100644
+--- a/drivers/usb/serial/option.c
++++ b/drivers/usb/serial/option.c
+@@ -249,6 +249,7 @@ static void option_instat_callback(struct urb *urb);
+ #define QUECTEL_PRODUCT_EC25			0x0125
+ #define QUECTEL_PRODUCT_BG96			0x0296
+ #define QUECTEL_PRODUCT_EP06			0x0306
++#define QUECTEL_PRODUCT_EM12			0x0512
+ 
+ #define CMOTECH_VENDOR_ID			0x16d8
+ #define CMOTECH_PRODUCT_6001			0x6001
+@@ -1069,7 +1070,8 @@ static const struct usb_device_id option_ids[] = {
+ 	  .driver_info = RSVD(3) },
+ 	{ USB_DEVICE(QUALCOMM_VENDOR_ID, 0x6613)}, /* Onda H600/ZTE MF330 */
+ 	{ USB_DEVICE(QUALCOMM_VENDOR_ID, 0x0023)}, /* ONYX 3G device */
+-	{ USB_DEVICE(QUALCOMM_VENDOR_ID, 0x9000)}, /* SIMCom SIM5218 */
++	{ USB_DEVICE(QUALCOMM_VENDOR_ID, 0x9000), /* SIMCom SIM5218 */
++	  .driver_info = NCTRL(0) | NCTRL(1) | NCTRL(2) | NCTRL(3) | RSVD(4) },
+ 	/* Quectel products using Qualcomm vendor ID */
+ 	{ USB_DEVICE(QUALCOMM_VENDOR_ID, QUECTEL_PRODUCT_UC15)},
+ 	{ USB_DEVICE(QUALCOMM_VENDOR_ID, QUECTEL_PRODUCT_UC20),
+@@ -1090,6 +1092,9 @@ static const struct usb_device_id option_ids[] = {
+ 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EP06, 0xff, 0xff, 0xff),
+ 	  .driver_info = RSVD(1) | RSVD(2) | RSVD(3) | RSVD(4) | NUMEP2 },
+ 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EP06, 0xff, 0, 0) },
++	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EM12, 0xff, 0xff, 0xff),
++	  .driver_info = RSVD(1) | RSVD(2) | RSVD(3) | RSVD(4) | NUMEP2 },
++	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EM12, 0xff, 0, 0) },
+ 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6001) },
+ 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_CMU_300) },
+ 	{ USB_DEVICE(CMOTECH_VENDOR_ID, CMOTECH_PRODUCT_6003),
+@@ -1942,10 +1947,12 @@ static const struct usb_device_id option_ids[] = {
+ 	  .driver_info = RSVD(4) },
+ 	{ USB_DEVICE_INTERFACE_CLASS(0x2001, 0x7e35, 0xff),			/* D-Link DWM-222 */
+ 	  .driver_info = RSVD(4) },
+-	{ USB_DEVICE_AND_INTERFACE_INFO(0x07d1, 0x3e01, 0xff, 0xff, 0xff) }, /* D-Link DWM-152/C1 */
+-	{ USB_DEVICE_AND_INTERFACE_INFO(0x07d1, 0x3e02, 0xff, 0xff, 0xff) }, /* D-Link DWM-156/C1 */
+-	{ USB_DEVICE_AND_INTERFACE_INFO(0x07d1, 0x7e11, 0xff, 0xff, 0xff) }, /* D-Link DWM-156/A3 */
+-	{ USB_DEVICE_INTERFACE_CLASS(0x2020, 0x4000, 0xff) },                /* OLICARD300 - MT6225 */
++	{ USB_DEVICE_AND_INTERFACE_INFO(0x07d1, 0x3e01, 0xff, 0xff, 0xff) },	/* D-Link DWM-152/C1 */
++	{ USB_DEVICE_AND_INTERFACE_INFO(0x07d1, 0x3e02, 0xff, 0xff, 0xff) },	/* D-Link DWM-156/C1 */
++	{ USB_DEVICE_AND_INTERFACE_INFO(0x07d1, 0x7e11, 0xff, 0xff, 0xff) },	/* D-Link DWM-156/A3 */
++	{ USB_DEVICE_INTERFACE_CLASS(0x2020, 0x2031, 0xff),			/* Olicard 600 */
++	  .driver_info = RSVD(4) },
++	{ USB_DEVICE_INTERFACE_CLASS(0x2020, 0x4000, 0xff) },			/* OLICARD300 - MT6225 */
+ 	{ USB_DEVICE(INOVIA_VENDOR_ID, INOVIA_SEW858) },
+ 	{ USB_DEVICE(VIATELECOM_VENDOR_ID, VIATELECOM_PRODUCT_CDS7) },
+ 	{ USB_DEVICE_AND_INTERFACE_INFO(WETELECOM_VENDOR_ID, WETELECOM_PRODUCT_WMD200, 0xff, 0xff, 0xff) },
+diff --git a/drivers/video/fbdev/goldfishfb.c b/drivers/video/fbdev/goldfishfb.c
+index 14a93cb21310..66d58e93bc32 100644
+--- a/drivers/video/fbdev/goldfishfb.c
++++ b/drivers/video/fbdev/goldfishfb.c
+@@ -234,7 +234,7 @@ static int goldfish_fb_probe(struct platform_device *pdev)
+ 	fb->fb.var.activate	= FB_ACTIVATE_NOW;
+ 	fb->fb.var.height	= readl(fb->reg_base + FB_GET_PHYS_HEIGHT);
+ 	fb->fb.var.width	= readl(fb->reg_base + FB_GET_PHYS_WIDTH);
+-	fb->fb.var.pixclock	= 10000;
++	fb->fb.var.pixclock	= 0;
+ 
+ 	fb->fb.var.red.offset = 11;
+ 	fb->fb.var.red.length = 5;
+diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
+index 2e995e565633..1e35a2327478 100644
+--- a/fs/btrfs/raid56.c
++++ b/fs/btrfs/raid56.c
+@@ -2414,8 +2414,9 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
+ 			bitmap_clear(rbio->dbitmap, pagenr, 1);
+ 		kunmap(p);
+ 
+-		for (stripe = 0; stripe < rbio->real_stripes; stripe++)
++		for (stripe = 0; stripe < nr_data; stripe++)
+ 			kunmap(page_in_rbio(rbio, stripe, pagenr, 0));
++		kunmap(p_page);
+ 	}
+ 
+ 	__free_page(p_page);
+diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
+index 179a383a4aaa..9d72882b0f72 100644
+--- a/fs/btrfs/tree-log.c
++++ b/fs/btrfs/tree-log.c
+@@ -3422,9 +3422,16 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
+ 	}
+ 	btrfs_release_path(path);
+ 
+-	/* find the first key from this transaction again */
++	/*
++	 * Find the first key from this transaction again.  See the note for
++	 * log_new_dir_dentries, if we're logging a directory recursively we
++	 * won't be holding its i_mutex, which means we can modify the directory
++	 * while we're logging it.  If we remove an entry between our first
++	 * search and this search we'll not find the key again and can just
++	 * bail.
++	 */
+ 	ret = btrfs_search_slot(NULL, root, &min_key, path, 0, 0);
+-	if (WARN_ON(ret != 0))
++	if (ret != 0)
+ 		goto done;
+ 
+ 	/*
+@@ -4501,6 +4508,19 @@ static int logged_inode_size(struct btrfs_root *log, struct btrfs_inode *inode,
+ 		item = btrfs_item_ptr(path->nodes[0], path->slots[0],
+ 				      struct btrfs_inode_item);
+ 		*size_ret = btrfs_inode_size(path->nodes[0], item);
++		/*
++		 * If the in-memory inode's i_size is smaller then the inode
++		 * size stored in the btree, return the inode's i_size, so
++		 * that we get a correct inode size after replaying the log
++		 * when before a power failure we had a shrinking truncate
++		 * followed by addition of a new name (rename / new hard link).
++		 * Otherwise return the inode size from the btree, to avoid
++		 * data loss when replaying a log due to previously doing a
++		 * write that expands the inode's size and logging a new name
++		 * immediately after.
++		 */
++		if (*size_ret > inode->vfs_inode.i_size)
++			*size_ret = inode->vfs_inode.i_size;
+ 	}
+ 
+ 	btrfs_release_path(path);
+diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
+index 9041a892701f..a225f98c9903 100644
+--- a/fs/nfs/nfs4proc.c
++++ b/fs/nfs/nfs4proc.c
+@@ -2746,7 +2746,8 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
+ 			nfs4_schedule_stateid_recovery(server, state);
+ 	}
+ out:
+-	nfs4_sequence_free_slot(&opendata->o_res.seq_res);
++	if (!opendata->cancelled)
++		nfs4_sequence_free_slot(&opendata->o_res.seq_res);
+ 	return ret;
+ }
+ 
+diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
+index 824f407df1db..3a4e1bca5e31 100644
+--- a/fs/ocfs2/refcounttree.c
++++ b/fs/ocfs2/refcounttree.c
+@@ -4716,22 +4716,23 @@ out:
+ 
+ /* Lock an inode and grab a bh pointing to the inode. */
+ static int ocfs2_reflink_inodes_lock(struct inode *s_inode,
+-				     struct buffer_head **bh1,
++				     struct buffer_head **bh_s,
+ 				     struct inode *t_inode,
+-				     struct buffer_head **bh2)
++				     struct buffer_head **bh_t)
+ {
+-	struct inode *inode1;
+-	struct inode *inode2;
++	struct inode *inode1 = s_inode;
++	struct inode *inode2 = t_inode;
+ 	struct ocfs2_inode_info *oi1;
+ 	struct ocfs2_inode_info *oi2;
++	struct buffer_head *bh1 = NULL;
++	struct buffer_head *bh2 = NULL;
+ 	bool same_inode = (s_inode == t_inode);
++	bool need_swap = (inode1->i_ino > inode2->i_ino);
+ 	int status;
+ 
+ 	/* First grab the VFS and rw locks. */
+ 	lock_two_nondirectories(s_inode, t_inode);
+-	inode1 = s_inode;
+-	inode2 = t_inode;
+-	if (inode1->i_ino > inode2->i_ino)
++	if (need_swap)
+ 		swap(inode1, inode2);
+ 
+ 	status = ocfs2_rw_lock(inode1, 1);
+@@ -4754,17 +4755,13 @@ static int ocfs2_reflink_inodes_lock(struct inode *s_inode,
+ 	trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
+ 				(unsigned long long)oi2->ip_blkno);
+ 
+-	if (*bh1)
+-		*bh1 = NULL;
+-	if (*bh2)
+-		*bh2 = NULL;
+-
+ 	/* We always want to lock the one with the lower lockid first. */
+ 	if (oi1->ip_blkno > oi2->ip_blkno)
+ 		mlog_errno(-ENOLCK);
+ 
+ 	/* lock id1 */
+-	status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_REFLINK_TARGET);
++	status = ocfs2_inode_lock_nested(inode1, &bh1, 1,
++					 OI_LS_REFLINK_TARGET);
+ 	if (status < 0) {
+ 		if (status != -ENOENT)
+ 			mlog_errno(status);
+@@ -4773,15 +4770,25 @@ static int ocfs2_reflink_inodes_lock(struct inode *s_inode,
+ 
+ 	/* lock id2 */
+ 	if (!same_inode) {
+-		status = ocfs2_inode_lock_nested(inode2, bh2, 1,
++		status = ocfs2_inode_lock_nested(inode2, &bh2, 1,
+ 						 OI_LS_REFLINK_TARGET);
+ 		if (status < 0) {
+ 			if (status != -ENOENT)
+ 				mlog_errno(status);
+ 			goto out_cl1;
+ 		}
+-	} else
+-		*bh2 = *bh1;
++	} else {
++		bh2 = bh1;
++	}
++
++	/*
++	 * If we swapped inode order above, we have to swap the buffer heads
++	 * before passing them back to the caller.
++	 */
++	if (need_swap)
++		swap(bh1, bh2);
++	*bh_s = bh1;
++	*bh_t = bh2;
+ 
+ 	trace_ocfs2_double_lock_end(
+ 			(unsigned long long)OCFS2_I(inode1)->ip_blkno,
+@@ -4791,8 +4798,7 @@ static int ocfs2_reflink_inodes_lock(struct inode *s_inode,
+ 
+ out_cl1:
+ 	ocfs2_inode_unlock(inode1, 1);
+-	brelse(*bh1);
+-	*bh1 = NULL;
++	brelse(bh1);
+ out_rw2:
+ 	ocfs2_rw_unlock(inode2, 1);
+ out_i2:
+diff --git a/fs/open.c b/fs/open.c
+index 7ea118471dce..28a3956c4479 100644
+--- a/fs/open.c
++++ b/fs/open.c
+@@ -716,6 +716,12 @@ static int do_dentry_open(struct file *f,
+ 		return 0;
+ 	}
+ 
++	/* Any file opened for execve()/uselib() has to be a regular file. */
++	if (unlikely(f->f_flags & FMODE_EXEC && !S_ISREG(inode->i_mode))) {
++		error = -EACCES;
++		goto cleanup_file;
++	}
++
+ 	if (f->f_mode & FMODE_WRITE && !special_file(inode->i_mode)) {
+ 		error = get_write_access(inode);
+ 		if (unlikely(error))
+diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
+index f69c545f5868..8d5422bb9c1a 100644
+--- a/fs/proc/proc_sysctl.c
++++ b/fs/proc/proc_sysctl.c
+@@ -1620,7 +1620,8 @@ static void drop_sysctl_table(struct ctl_table_header *header)
+ 	if (--header->nreg)
+ 		return;
+ 
+-	put_links(header);
++	if (parent)
++		put_links(header);
+ 	start_unregistering(header);
+ 	if (!--header->count)
+ 		kfree_rcu(header, rcu);
+diff --git a/include/net/sctp/checksum.h b/include/net/sctp/checksum.h
+index 4a5b9a306c69..803fc26ef0ba 100644
+--- a/include/net/sctp/checksum.h
++++ b/include/net/sctp/checksum.h
+@@ -60,7 +60,7 @@ static inline __wsum sctp_csum_combine(__wsum csum, __wsum csum2,
+ static inline __le32 sctp_compute_cksum(const struct sk_buff *skb,
+ 					unsigned int offset)
+ {
+-	struct sctphdr *sh = sctp_hdr(skb);
++	struct sctphdr *sh = (struct sctphdr *)(skb->data + offset);
+         __le32 ret, old = sh->checksum;
+ 	const struct skb_checksum_ops ops = {
+ 		.update  = sctp_csum_update,
+diff --git a/include/net/sock.h b/include/net/sock.h
+index 4280e96d4b46..60eef7f1ac05 100644
+--- a/include/net/sock.h
++++ b/include/net/sock.h
+@@ -682,6 +682,12 @@ static inline void sk_add_node_rcu(struct sock *sk, struct hlist_head *list)
+ 		hlist_add_head_rcu(&sk->sk_node, list);
+ }
+ 
++static inline void sk_add_node_tail_rcu(struct sock *sk, struct hlist_head *list)
++{
++	sock_hold(sk);
++	hlist_add_tail_rcu(&sk->sk_node, list);
++}
++
+ static inline void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list)
+ {
+ 	hlist_nulls_add_head_rcu(&sk->sk_nulls_node, list);
+diff --git a/kernel/cpu.c b/kernel/cpu.c
+index 0171754db32b..32f0432f0c26 100644
+--- a/kernel/cpu.c
++++ b/kernel/cpu.c
+@@ -538,6 +538,20 @@ static void undo_cpu_up(unsigned int cpu, struct cpuhp_cpu_state *st)
+ 	}
+ }
+ 
++static inline bool can_rollback_cpu(struct cpuhp_cpu_state *st)
++{
++	if (IS_ENABLED(CONFIG_HOTPLUG_CPU))
++		return true;
++	/*
++	 * When CPU hotplug is disabled, then taking the CPU down is not
++	 * possible because takedown_cpu() and the architecture and
++	 * subsystem specific mechanisms are not available. So the CPU
++	 * which would be completely unplugged again needs to stay around
++	 * in the current state.
++	 */
++	return st->state <= CPUHP_BRINGUP_CPU;
++}
++
+ static int cpuhp_up_callbacks(unsigned int cpu, struct cpuhp_cpu_state *st,
+ 			      enum cpuhp_state target)
+ {
+@@ -548,8 +562,10 @@ static int cpuhp_up_callbacks(unsigned int cpu, struct cpuhp_cpu_state *st,
+ 		st->state++;
+ 		ret = cpuhp_invoke_callback(cpu, st->state, true, NULL, NULL);
+ 		if (ret) {
+-			st->target = prev_state;
+-			undo_cpu_up(cpu, st);
++			if (can_rollback_cpu(st)) {
++				st->target = prev_state;
++				undo_cpu_up(cpu, st);
++			}
+ 			break;
+ 		}
+ 	}
+diff --git a/lib/rhashtable.c b/lib/rhashtable.c
+index cebbcec877d7..cb577ca65fa9 100644
+--- a/lib/rhashtable.c
++++ b/lib/rhashtable.c
+@@ -459,8 +459,12 @@ static void rht_deferred_worker(struct work_struct *work)
+ 	else if (tbl->nest)
+ 		err = rhashtable_rehash_alloc(ht, tbl, tbl->size);
+ 
+-	if (!err)
+-		err = rhashtable_rehash_table(ht);
++	if (!err || err == -EEXIST) {
++		int nerr;
++
++		nerr = rhashtable_rehash_table(ht);
++		err = err ?: nerr;
++	}
+ 
+ 	mutex_unlock(&ht->mutex);
+ 
+diff --git a/mm/migrate.c b/mm/migrate.c
+index 877269339fa7..9a3ce8847308 100644
+--- a/mm/migrate.c
++++ b/mm/migrate.c
+@@ -247,10 +247,8 @@ static bool remove_migration_pte(struct page *page, struct vm_area_struct *vma,
+ 				pte = swp_entry_to_pte(entry);
+ 			} else if (is_device_public_page(new)) {
+ 				pte = pte_mkdevmap(pte);
+-				flush_dcache_page(new);
+ 			}
+-		} else
+-			flush_dcache_page(new);
++		}
+ 
+ #ifdef CONFIG_HUGETLB_PAGE
+ 		if (PageHuge(new)) {
+@@ -971,6 +969,13 @@ static int move_to_new_page(struct page *newpage, struct page *page,
+ 		 */
+ 		if (!PageMappingFlags(page))
+ 			page->mapping = NULL;
++
++		if (unlikely(is_zone_device_page(newpage))) {
++			if (is_device_public_page(newpage))
++				flush_dcache_page(newpage);
++		} else
++			flush_dcache_page(newpage);
++
+ 	}
+ out:
+ 	return rc;
+diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
+index 9b7907ebfa01..b510da76170e 100644
+--- a/net/bluetooth/l2cap_core.c
++++ b/net/bluetooth/l2cap_core.c
+@@ -3336,16 +3336,22 @@ static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data
+ 
+ 	while (len >= L2CAP_CONF_OPT_SIZE) {
+ 		len -= l2cap_get_conf_opt(&req, &type, &olen, &val);
++		if (len < 0)
++			break;
+ 
+ 		hint  = type & L2CAP_CONF_HINT;
+ 		type &= L2CAP_CONF_MASK;
+ 
+ 		switch (type) {
+ 		case L2CAP_CONF_MTU:
++			if (olen != 2)
++				break;
+ 			mtu = val;
+ 			break;
+ 
+ 		case L2CAP_CONF_FLUSH_TO:
++			if (olen != 2)
++				break;
+ 			chan->flush_to = val;
+ 			break;
+ 
+@@ -3353,26 +3359,30 @@ static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data
+ 			break;
+ 
+ 		case L2CAP_CONF_RFC:
+-			if (olen == sizeof(rfc))
+-				memcpy(&rfc, (void *) val, olen);
++			if (olen != sizeof(rfc))
++				break;
++			memcpy(&rfc, (void *) val, olen);
+ 			break;
+ 
+ 		case L2CAP_CONF_FCS:
++			if (olen != 1)
++				break;
+ 			if (val == L2CAP_FCS_NONE)
+ 				set_bit(CONF_RECV_NO_FCS, &chan->conf_state);
+ 			break;
+ 
+ 		case L2CAP_CONF_EFS:
+-			if (olen == sizeof(efs)) {
+-				remote_efs = 1;
+-				memcpy(&efs, (void *) val, olen);
+-			}
++			if (olen != sizeof(efs))
++				break;
++			remote_efs = 1;
++			memcpy(&efs, (void *) val, olen);
+ 			break;
+ 
+ 		case L2CAP_CONF_EWS:
++			if (olen != 2)
++				break;
+ 			if (!(chan->conn->local_fixed_chan & L2CAP_FC_A2MP))
+ 				return -ECONNREFUSED;
+-
+ 			set_bit(FLAG_EXT_CTRL, &chan->flags);
+ 			set_bit(CONF_EWS_RECV, &chan->conf_state);
+ 			chan->tx_win_max = L2CAP_DEFAULT_EXT_WINDOW;
+@@ -3382,7 +3392,6 @@ static int l2cap_parse_conf_req(struct l2cap_chan *chan, void *data, size_t data
+ 		default:
+ 			if (hint)
+ 				break;
+-
+ 			result = L2CAP_CONF_UNKNOWN;
+ 			*((u8 *) ptr++) = type;
+ 			break;
+@@ -3547,58 +3556,65 @@ static int l2cap_parse_conf_rsp(struct l2cap_chan *chan, void *rsp, int len,
+ 
+ 	while (len >= L2CAP_CONF_OPT_SIZE) {
+ 		len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);
++		if (len < 0)
++			break;
+ 
+ 		switch (type) {
+ 		case L2CAP_CONF_MTU:
++			if (olen != 2)
++				break;
+ 			if (val < L2CAP_DEFAULT_MIN_MTU) {
+ 				*result = L2CAP_CONF_UNACCEPT;
+ 				chan->imtu = L2CAP_DEFAULT_MIN_MTU;
+ 			} else
+ 				chan->imtu = val;
+-			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu, endptr - ptr);
++			l2cap_add_conf_opt(&ptr, L2CAP_CONF_MTU, 2, chan->imtu,
++					   endptr - ptr);
+ 			break;
+ 
+ 		case L2CAP_CONF_FLUSH_TO:
++			if (olen != 2)
++				break;
+ 			chan->flush_to = val;
+-			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO,
+-					   2, chan->flush_to, endptr - ptr);
++			l2cap_add_conf_opt(&ptr, L2CAP_CONF_FLUSH_TO, 2,
++					   chan->flush_to, endptr - ptr);
+ 			break;
+ 
+ 		case L2CAP_CONF_RFC:
+-			if (olen == sizeof(rfc))
+-				memcpy(&rfc, (void *)val, olen);
+-
++			if (olen != sizeof(rfc))
++				break;
++			memcpy(&rfc, (void *)val, olen);
+ 			if (test_bit(CONF_STATE2_DEVICE, &chan->conf_state) &&
+ 			    rfc.mode != chan->mode)
+ 				return -ECONNREFUSED;
+-
+ 			chan->fcs = 0;
+-
+-			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC,
+-					   sizeof(rfc), (unsigned long) &rfc, endptr - ptr);
++			l2cap_add_conf_opt(&ptr, L2CAP_CONF_RFC, sizeof(rfc),
++					   (unsigned long) &rfc, endptr - ptr);
+ 			break;
+ 
+ 		case L2CAP_CONF_EWS:
++			if (olen != 2)
++				break;
+ 			chan->ack_win = min_t(u16, val, chan->ack_win);
+ 			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EWS, 2,
+ 					   chan->tx_win, endptr - ptr);
+ 			break;
+ 
+ 		case L2CAP_CONF_EFS:
+-			if (olen == sizeof(efs)) {
+-				memcpy(&efs, (void *)val, olen);
+-
+-				if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
+-				    efs.stype != L2CAP_SERV_NOTRAFIC &&
+-				    efs.stype != chan->local_stype)
+-					return -ECONNREFUSED;
+-
+-				l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
+-						   (unsigned long) &efs, endptr - ptr);
+-			}
++			if (olen != sizeof(efs))
++				break;
++			memcpy(&efs, (void *)val, olen);
++			if (chan->local_stype != L2CAP_SERV_NOTRAFIC &&
++			    efs.stype != L2CAP_SERV_NOTRAFIC &&
++			    efs.stype != chan->local_stype)
++				return -ECONNREFUSED;
++			l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs),
++					   (unsigned long) &efs, endptr - ptr);
+ 			break;
+ 
+ 		case L2CAP_CONF_FCS:
++			if (olen != 1)
++				break;
+ 			if (*result == L2CAP_CONF_PENDING)
+ 				if (val == L2CAP_FCS_NONE)
+ 					set_bit(CONF_RECV_NO_FCS,
+@@ -3727,13 +3743,18 @@ static void l2cap_conf_rfc_get(struct l2cap_chan *chan, void *rsp, int len)
+ 
+ 	while (len >= L2CAP_CONF_OPT_SIZE) {
+ 		len -= l2cap_get_conf_opt(&rsp, &type, &olen, &val);
++		if (len < 0)
++			break;
+ 
+ 		switch (type) {
+ 		case L2CAP_CONF_RFC:
+-			if (olen == sizeof(rfc))
+-				memcpy(&rfc, (void *)val, olen);
++			if (olen != sizeof(rfc))
++				break;
++			memcpy(&rfc, (void *)val, olen);
+ 			break;
+ 		case L2CAP_CONF_EWS:
++			if (olen != 2)
++				break;
+ 			txwin_ext = val;
+ 			break;
+ 		}
+diff --git a/net/core/datagram.c b/net/core/datagram.c
+index d8a0774f7608..dcb333e95702 100644
+--- a/net/core/datagram.c
++++ b/net/core/datagram.c
+@@ -281,7 +281,7 @@ struct sk_buff *__skb_try_recv_datagram(struct sock *sk, unsigned int flags,
+ 			break;
+ 
+ 		sk_busy_loop(sk, flags & MSG_DONTWAIT);
+-	} while (!skb_queue_empty(&sk->sk_receive_queue));
++	} while (sk->sk_receive_queue.prev != *last);
+ 
+ 	error = -EAGAIN;
+ 
+diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
+index c6a2655cc28a..dee57c5ff738 100644
+--- a/net/core/net-sysfs.c
++++ b/net/core/net-sysfs.c
+@@ -917,6 +917,8 @@ static int rx_queue_add_kobject(struct net_device *dev, int index)
+ 	if (error)
+ 		return error;
+ 
++	dev_hold(queue->dev);
++
+ 	if (dev->sysfs_rx_queue_group) {
+ 		error = sysfs_create_group(kobj, dev->sysfs_rx_queue_group);
+ 		if (error) {
+@@ -926,7 +928,6 @@ static int rx_queue_add_kobject(struct net_device *dev, int index)
+ 	}
+ 
+ 	kobject_uevent(kobj, KOBJ_ADD);
+-	dev_hold(queue->dev);
+ 
+ 	return error;
+ }
+@@ -1327,6 +1328,8 @@ static int netdev_queue_add_kobject(struct net_device *dev, int index)
+ 	if (error)
+ 		return error;
+ 
++	dev_hold(queue->dev);
++
+ #ifdef CONFIG_BQL
+ 	error = sysfs_create_group(kobj, &dql_group);
+ 	if (error) {
+@@ -1336,7 +1339,6 @@ static int netdev_queue_add_kobject(struct net_device *dev, int index)
+ #endif
+ 
+ 	kobject_uevent(kobj, KOBJ_ADD);
+-	dev_hold(queue->dev);
+ 
+ 	return 0;
+ }
+diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
+index 6344f1b18a6a..58a401e9cf09 100644
+--- a/net/dccp/ipv6.c
++++ b/net/dccp/ipv6.c
+@@ -433,8 +433,8 @@ static struct sock *dccp_v6_request_recv_sock(const struct sock *sk,
+ 		newnp->ipv6_mc_list = NULL;
+ 		newnp->ipv6_ac_list = NULL;
+ 		newnp->ipv6_fl_list = NULL;
+-		newnp->mcast_oif   = inet6_iif(skb);
+-		newnp->mcast_hops  = ipv6_hdr(skb)->hop_limit;
++		newnp->mcast_oif   = inet_iif(skb);
++		newnp->mcast_hops  = ip_hdr(skb)->ttl;
+ 
+ 		/*
+ 		 * No need to charge this sock to the relevant IPv6 refcnt debug socks count
+diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
+index ba8586aadffa..7b4ce3f9e2f4 100644
+--- a/net/ipv6/tcp_ipv6.c
++++ b/net/ipv6/tcp_ipv6.c
+@@ -1083,11 +1083,11 @@ static struct sock *tcp_v6_syn_recv_sock(const struct sock *sk, struct sk_buff *
+ 		newnp->ipv6_fl_list = NULL;
+ 		newnp->pktoptions  = NULL;
+ 		newnp->opt	   = NULL;
+-		newnp->mcast_oif   = tcp_v6_iif(skb);
+-		newnp->mcast_hops  = ipv6_hdr(skb)->hop_limit;
+-		newnp->rcv_flowinfo = ip6_flowinfo(ipv6_hdr(skb));
++		newnp->mcast_oif   = inet_iif(skb);
++		newnp->mcast_hops  = ip_hdr(skb)->ttl;
++		newnp->rcv_flowinfo = 0;
+ 		if (np->repflow)
+-			newnp->flow_label = ip6_flowlabel(ipv6_hdr(skb));
++			newnp->flow_label = 0;
+ 
+ 		/*
+ 		 * No need to charge this sock to the relevant IPv6 refcnt debug socks count
+diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
+index b9ce82c9440f..e9b8b0b0ac43 100644
+--- a/net/netlink/genetlink.c
++++ b/net/netlink/genetlink.c
+@@ -365,7 +365,7 @@ int genl_register_family(struct genl_family *family)
+ 			       start, end + 1, GFP_KERNEL);
+ 	if (family->id < 0) {
+ 		err = family->id;
+-		goto errout_locked;
++		goto errout_free;
+ 	}
+ 
+ 	err = genl_validate_assign_mc_groups(family);
+@@ -384,6 +384,7 @@ int genl_register_family(struct genl_family *family)
+ 
+ errout_remove:
+ 	idr_remove(&genl_fam_idr, family->id);
++errout_free:
+ 	kfree(family->attrbuf);
+ errout_locked:
+ 	genl_unlock_all();
+diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
+index a2bd5917a2a9..e8ca6aa3a32f 100644
+--- a/net/packet/af_packet.c
++++ b/net/packet/af_packet.c
+@@ -3281,7 +3281,7 @@ static int packet_create(struct net *net, struct socket *sock, int protocol,
+ 	}
+ 
+ 	mutex_lock(&net->packet.sklist_lock);
+-	sk_add_node_rcu(sk, &net->packet.sklist);
++	sk_add_node_tail_rcu(sk, &net->packet.sklist);
+ 	mutex_unlock(&net->packet.sklist_lock);
+ 
+ 	preempt_disable();
+@@ -4232,7 +4232,7 @@ static struct pgv *alloc_pg_vec(struct tpacket_req *req, int order)
+ 	struct pgv *pg_vec;
+ 	int i;
+ 
+-	pg_vec = kcalloc(block_nr, sizeof(struct pgv), GFP_KERNEL);
++	pg_vec = kcalloc(block_nr, sizeof(struct pgv), GFP_KERNEL | __GFP_NOWARN);
+ 	if (unlikely(!pg_vec))
+ 		goto out;
+ 
+diff --git a/net/rose/rose_subr.c b/net/rose/rose_subr.c
+index 7ca57741b2fb..7849f286bb93 100644
+--- a/net/rose/rose_subr.c
++++ b/net/rose/rose_subr.c
+@@ -105,16 +105,17 @@ void rose_write_internal(struct sock *sk, int frametype)
+ 	struct sk_buff *skb;
+ 	unsigned char  *dptr;
+ 	unsigned char  lci1, lci2;
+-	char buffer[100];
+-	int len, faclen = 0;
++	int maxfaclen = 0;
++	int len, faclen;
++	int reserve;
+ 
+-	len = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + ROSE_MIN_LEN + 1;
++	reserve = AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1;
++	len = ROSE_MIN_LEN;
+ 
+ 	switch (frametype) {
+ 	case ROSE_CALL_REQUEST:
+ 		len   += 1 + ROSE_ADDR_LEN + ROSE_ADDR_LEN;
+-		faclen = rose_create_facilities(buffer, rose);
+-		len   += faclen;
++		maxfaclen = 256;
+ 		break;
+ 	case ROSE_CALL_ACCEPTED:
+ 	case ROSE_CLEAR_REQUEST:
+@@ -123,15 +124,16 @@ void rose_write_internal(struct sock *sk, int frametype)
+ 		break;
+ 	}
+ 
+-	if ((skb = alloc_skb(len, GFP_ATOMIC)) == NULL)
++	skb = alloc_skb(reserve + len + maxfaclen, GFP_ATOMIC);
++	if (!skb)
+ 		return;
+ 
+ 	/*
+ 	 *	Space for AX.25 header and PID.
+ 	 */
+-	skb_reserve(skb, AX25_BPQ_HEADER_LEN + AX25_MAX_HEADER_LEN + 1);
++	skb_reserve(skb, reserve);
+ 
+-	dptr = skb_put(skb, skb_tailroom(skb));
++	dptr = skb_put(skb, len);
+ 
+ 	lci1 = (rose->lci >> 8) & 0x0F;
+ 	lci2 = (rose->lci >> 0) & 0xFF;
+@@ -146,7 +148,8 @@ void rose_write_internal(struct sock *sk, int frametype)
+ 		dptr   += ROSE_ADDR_LEN;
+ 		memcpy(dptr, &rose->source_addr, ROSE_ADDR_LEN);
+ 		dptr   += ROSE_ADDR_LEN;
+-		memcpy(dptr, buffer, faclen);
++		faclen = rose_create_facilities(dptr, rose);
++		skb_put(skb, faclen);
+ 		dptr   += faclen;
+ 		break;
+ 
+diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
+index e36a673833ae..c22041a4fc36 100644
+--- a/scripts/mod/modpost.c
++++ b/scripts/mod/modpost.c
+@@ -645,7 +645,7 @@ static void handle_modversions(struct module *mod, struct elf_info *info,
+ 			       info->sechdrs[sym->st_shndx].sh_offset -
+ 			       (info->hdr->e_type != ET_REL ?
+ 				info->sechdrs[sym->st_shndx].sh_addr : 0);
+-			crc = *crcp;
++			crc = TO_NATIVE(*crcp);
+ 		}
+ 		sym_update_crc(symname + strlen(CRC_PFX), mod, crc,
+ 				export);
+diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
+index df358e838b5b..bb0ab0f6ce9d 100644
+--- a/sound/core/oss/pcm_oss.c
++++ b/sound/core/oss/pcm_oss.c
+@@ -940,6 +940,28 @@ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
+ 	oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
+ 			 params_channels(params) / 8;
+ 
++	err = snd_pcm_oss_period_size(substream, params, sparams);
++	if (err < 0)
++		goto failure;
++
++	n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
++	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
++	if (err < 0)
++		goto failure;
++
++	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
++				     runtime->oss.periods, NULL);
++	if (err < 0)
++		goto failure;
++
++	snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
++
++	err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams);
++	if (err < 0) {
++		pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
++		goto failure;
++	}
++
+ #ifdef CONFIG_SND_PCM_OSS_PLUGINS
+ 	snd_pcm_oss_plugin_clear(substream);
+ 	if (!direct) {
+@@ -974,27 +996,6 @@ static int snd_pcm_oss_change_params_locked(struct snd_pcm_substream *substream)
+ 	}
+ #endif
+ 
+-	err = snd_pcm_oss_period_size(substream, params, sparams);
+-	if (err < 0)
+-		goto failure;
+-
+-	n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
+-	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
+-	if (err < 0)
+-		goto failure;
+-
+-	err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
+-				     runtime->oss.periods, NULL);
+-	if (err < 0)
+-		goto failure;
+-
+-	snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
+-
+-	if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
+-		pcm_dbg(substream->pcm, "HW_PARAMS failed: %i\n", err);
+-		goto failure;
+-	}
+-
+ 	if (runtime->oss.trigger) {
+ 		sw_params->start_threshold = 1;
+ 	} else {
+diff --git a/sound/core/pcm_native.c b/sound/core/pcm_native.c
+index 966ac384c3f4..1a63d456a3dc 100644
+--- a/sound/core/pcm_native.c
++++ b/sound/core/pcm_native.c
+@@ -1395,8 +1395,15 @@ static int snd_pcm_pause(struct snd_pcm_substream *substream, int push)
+ static int snd_pcm_pre_suspend(struct snd_pcm_substream *substream, int state)
+ {
+ 	struct snd_pcm_runtime *runtime = substream->runtime;
+-	if (runtime->status->state == SNDRV_PCM_STATE_SUSPENDED)
++	switch (runtime->status->state) {
++	case SNDRV_PCM_STATE_SUSPENDED:
+ 		return -EBUSY;
++	/* unresumable PCM state; return -EBUSY for skipping suspend */
++	case SNDRV_PCM_STATE_OPEN:
++	case SNDRV_PCM_STATE_SETUP:
++	case SNDRV_PCM_STATE_DISCONNECTED:
++		return -EBUSY;
++	}
+ 	runtime->trigger_master = substream;
+ 	return 0;
+ }
+diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c
+index abacbbc0b0e8..d22472ba211e 100644
+--- a/sound/core/rawmidi.c
++++ b/sound/core/rawmidi.c
+@@ -29,6 +29,7 @@
+ #include <linux/mutex.h>
+ #include <linux/module.h>
+ #include <linux/delay.h>
++#include <linux/nospec.h>
+ #include <sound/rawmidi.h>
+ #include <sound/info.h>
+ #include <sound/control.h>
+@@ -591,6 +592,7 @@ static int __snd_rawmidi_info_select(struct snd_card *card,
+ 		return -ENXIO;
+ 	if (info->stream < 0 || info->stream > 1)
+ 		return -EINVAL;
++	info->stream = array_index_nospec(info->stream, 2);
+ 	pstr = &rmidi->streams[info->stream];
+ 	if (pstr->substream_count == 0)
+ 		return -ENOENT;
+diff --git a/sound/core/seq/oss/seq_oss_synth.c b/sound/core/seq/oss/seq_oss_synth.c
+index 278ebb993122..c93945917235 100644
+--- a/sound/core/seq/oss/seq_oss_synth.c
++++ b/sound/core/seq/oss/seq_oss_synth.c
+@@ -617,13 +617,14 @@ int
+ snd_seq_oss_synth_make_info(struct seq_oss_devinfo *dp, int dev, struct synth_info *inf)
+ {
+ 	struct seq_oss_synth *rec;
++	struct seq_oss_synthinfo *info = get_synthinfo_nospec(dp, dev);
+ 
+-	if (dev < 0 || dev >= dp->max_synthdev)
++	if (!info)
+ 		return -ENXIO;
+ 
+-	if (dp->synths[dev].is_midi) {
++	if (info->is_midi) {
+ 		struct midi_info minf;
+-		snd_seq_oss_midi_make_info(dp, dp->synths[dev].midi_mapped, &minf);
++		snd_seq_oss_midi_make_info(dp, info->midi_mapped, &minf);
+ 		inf->synth_type = SYNTH_TYPE_MIDI;
+ 		inf->synth_subtype = 0;
+ 		inf->nr_voices = 16;
+diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
+index 972fd95f08ca..9637d0bbdeb5 100644
+--- a/sound/pci/hda/patch_realtek.c
++++ b/sound/pci/hda/patch_realtek.c
+@@ -5436,6 +5436,9 @@ enum {
+ 	ALC298_FIXUP_TPT470_DOCK,
+ 	ALC255_FIXUP_DUMMY_LINEOUT_VERB,
+ 	ALC255_FIXUP_DELL_HEADSET_MIC,
++	ALC225_FIXUP_DELL_WYSE_AIO_MIC_NO_PRESENCE,
++	ALC225_FIXUP_WYSE_AUTO_MUTE,
++	ALC225_FIXUP_WYSE_DISABLE_MIC_VREF,
+ };
+ 
+ static const struct hda_fixup alc269_fixups[] = {
+@@ -6311,6 +6314,28 @@ static const struct hda_fixup alc269_fixups[] = {
+ 		.chained = true,
+ 		.chain_id = ALC269_FIXUP_HEADSET_MIC
+ 	},
++	[ALC225_FIXUP_DELL_WYSE_AIO_MIC_NO_PRESENCE] = {
++		.type = HDA_FIXUP_PINS,
++		.v.pins = (const struct hda_pintbl[]) {
++			{ 0x16, 0x01011020 }, /* Rear Line out */
++			{ 0x19, 0x01a1913c }, /* use as Front headset mic, without its own jack detect */
++			{ }
++		},
++		.chained = true,
++		.chain_id = ALC225_FIXUP_WYSE_AUTO_MUTE
++	},
++	[ALC225_FIXUP_WYSE_AUTO_MUTE] = {
++		.type = HDA_FIXUP_FUNC,
++		.v.func = alc_fixup_auto_mute_via_amp,
++		.chained = true,
++		.chain_id = ALC225_FIXUP_WYSE_DISABLE_MIC_VREF
++	},
++	[ALC225_FIXUP_WYSE_DISABLE_MIC_VREF] = {
++		.type = HDA_FIXUP_FUNC,
++		.v.func = alc_fixup_disable_mic_vref,
++		.chained = true,
++		.chain_id = ALC269_FIXUP_HEADSET_MODE_NO_HP_MIC
++	},
+ };
+ 
+ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
+@@ -6369,6 +6394,8 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
+ 	SND_PCI_QUIRK(0x1028, 0x0871, "Dell Precision 3630", ALC255_FIXUP_DELL_HEADSET_MIC),
+ 	SND_PCI_QUIRK(0x1028, 0x0872, "Dell Precision 3630", ALC255_FIXUP_DELL_HEADSET_MIC),
+ 	SND_PCI_QUIRK(0x1028, 0x0873, "Dell Precision 3930", ALC255_FIXUP_DUMMY_LINEOUT_VERB),
++	SND_PCI_QUIRK(0x1028, 0x08ad, "Dell WYSE AIO", ALC225_FIXUP_DELL_WYSE_AIO_MIC_NO_PRESENCE),
++	SND_PCI_QUIRK(0x1028, 0x08ae, "Dell WYSE NB", ALC225_FIXUP_DELL1_MIC_NO_PRESENCE),
+ 	SND_PCI_QUIRK(0x1028, 0x0935, "Dell", ALC274_FIXUP_DELL_AIO_LINEOUT_VERB),
+ 	SND_PCI_QUIRK(0x1028, 0x164a, "Dell", ALC293_FIXUP_DELL1_MIC_NO_PRESENCE),
+ 	SND_PCI_QUIRK(0x1028, 0x164b, "Dell", ALC293_FIXUP_DELL1_MIC_NO_PRESENCE),
+diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+index f3db68abbd9a..0bc3e6e93c31 100644
+--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
++++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+@@ -251,19 +251,15 @@ struct intel_pt_decoder *intel_pt_decoder_new(struct intel_pt_params *params)
+ 		if (!(decoder->tsc_ctc_ratio_n % decoder->tsc_ctc_ratio_d))
+ 			decoder->tsc_ctc_mult = decoder->tsc_ctc_ratio_n /
+ 						decoder->tsc_ctc_ratio_d;
+-
+-		/*
+-		 * Allow for timestamps appearing to backwards because a TSC
+-		 * packet has slipped past a MTC packet, so allow 2 MTC ticks
+-		 * or ...
+-		 */
+-		decoder->tsc_slip = multdiv(2 << decoder->mtc_shift,
+-					decoder->tsc_ctc_ratio_n,
+-					decoder->tsc_ctc_ratio_d);
+ 	}
+-	/* ... or 0x100 paranoia */
+-	if (decoder->tsc_slip < 0x100)
+-		decoder->tsc_slip = 0x100;
++
++	/*
++	 * A TSC packet can slip past MTC packets so that the timestamp appears
++	 * to go backwards. One estimate is that can be up to about 40 CPU
++	 * cycles, which is certainly less than 0x1000 TSC ticks, but accept
++	 * slippage an order of magnitude more to be on the safe side.
++	 */
++	decoder->tsc_slip = 0x10000;
+ 
+ 	intel_pt_log("timestamp: mtc_shift %u\n", decoder->mtc_shift);
+ 	intel_pt_log("timestamp: tsc_ctc_ratio_n %u\n", decoder->tsc_ctc_ratio_n);
+diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
+index 66cc315efa6d..a373c60ef1c0 100644
+--- a/virt/kvm/kvm_main.c
++++ b/virt/kvm/kvm_main.c
+@@ -2812,6 +2812,9 @@ static long kvm_device_ioctl(struct file *filp, unsigned int ioctl,
+ {
+ 	struct kvm_device *dev = filp->private_data;
+ 
++	if (dev->kvm->mm != current->mm)
++		return -EIO;
++
+ 	switch (ioctl) {
+ 	case KVM_SET_DEVICE_ATTR:
+ 		return kvm_device_ioctl_attr(dev, dev->ops->set_attr, arg);