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From 48011f82726c263f49a2b9ca3d9f674bdb4cfd22 Mon Sep 17 00:00:00 2001
From: Alexander Wetzel <alexander@wetzel-home.de>
Date: Thu, 8 Jul 2021 16:37:43 +0200
Subject: [PATCH] Fix for 5.13+ kernels
Upstream commit d4455faccd6c ('proc: mandate ->proc_lseek
in "struct proc_ops"') made seek support for proc mandatory.
Not providing it will cause a null pointer exception for kernels
>=5.13.0
Signed-off-by: Alexander Wetzel <alexander@wetzel-home.de>
---
acpi_call.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/acpi_call.c b/acpi_call.c
index ebdda25..9fd9886 100644
--- a/acpi_call.c
+++ b/acpi_call.c
@@ -369,6 +369,9 @@ static ssize_t acpi_proc_read( struct file *filp, char __user *buff,
static struct proc_ops proc_acpi_operations = {
.proc_read = acpi_proc_read,
.proc_write = acpi_proc_write,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 13, 0)
+ .proc_lseek = default_llseek,
+#endif
};
#else
static struct file_operations proc_acpi_operations = {
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