Upgrade process:

	- Familiarize yourself with https://wiki.gentoo.org/wiki/Project:Toolchain/sys-kernel/linux-headers
	  and README*.
	- Generate the gentoo-headers-base-<kernel version>.tar.xz tarball:
	  $ ./rip-headers.sh 5.15
	- Create a new patchset dir:
	  $ cp -a 5.15/ 5.15/
	  $ git add 5.15
	- Generate the patchset tarball:
	  $ ./make-tarball.sh 5.15 1
	- Update the ebuild:
	  $ cp linux-headers-5.14.ebuild linux-headers-5.15.ebuild
	- Test it (see sections below)
	- Upload tarballs & commit files

Smoke test:

	for h in `find /usr/include/linux -type f -printf '%P '` ; do
		h="linux/$h"; echo "$h"
		gcc -x c -c -o /dev/null - <<<"#include <$h>"
	done

	egrep -l -r -e '__[us](8|16|32|64)' /usr/include/linux/ | xargs grep -L linux/types.h

	find /usr/include/linux -type f -printf '%P '

Check direct reverse dependencies of virtual/linux-headers:

	pkgs=$(sed -n '/^%/,/^%/{s:%::;p}' testing.txt)
	pkgs=$(echo ${pkgs} | tr ' ' '\n' | sed -e '/systemd-utils/d' | sed -e '/ps3pf_utils/d' | sed -e '/dahdi-tools/d' | sed -e '/geode/d' | sed -e '/xhkeys/d' | sed -e '/pulseaudio-daemon/d' | sed -e '/openssh-contrib/d' | sed -e '/libreswan/d' | sed -e '/ola/d' | tr '\n' ' ')
	emerge --keep-going -1v ${pkgs} --jobs 4

%
app-containers/crun
app-containers/lxc
app-emulation/qemu
app-emulation/wine-proton
app-emulation/wine-staging
app-emulation/wine-vanilla
app-emulation/xen-tools
app-i18n/jfbterm
app-metrics/collectd
app-misc/ddccontrol
app-misc/inputlircd
app-misc/lirc
app-misc/ola
app-misc/ps3pf_utils
app-misc/srm
dev-libs/libbpf
dev-libs/libbsd
dev-libs/libx86
dev-perl/perl-headers
dev-qt/qtgui
dev-qt/qtmultimedia
dev-util/bcc
dev-util/bootconfig
dev-util/bpftool
dev-util/oprofile
dev-util/perf
dev-util/rr
dev-debug/strace
dev-util/sysprof
dev-util/sysprof-capture
dev-util/trace-cmd
games-emulation/gnuboy
gnome-base/gnome-settings-daemon
gui-wm/dwl
kde-plasma/kwayland
media-gfx/sane-backends
media-libs/libgii
media-plugins/vdr-xineliboutput
media-sound/pulseaudio-daemon
media-tv/mythtv
media-video/ffmpeg
media-video/gpac
media-video/guvcview
media-video/mplayer
media-video/setpwc
media-video/webcamoid
net-analyzer/ifmetric
net-analyzer/netwatch
net-dialup/linux-atm
net-dialup/rp-pppoe
net-dialup/xl2tpd
net-firewall/iptables
net-firewall/ipt_netflow
net-ftp/frox
net-im/toxic
net-libs/gupnp
net-misc/bridge-utils
net-misc/connman
net-misc/dahdi-tools
net-misc/ifenslave
net-misc/lksctp-tools
net-misc/mptcpd
net-misc/networkmanager
net-misc/openssh
net-misc/openssh-contrib
net-misc/pingu
net-misc/tipcutils
net-misc/usbip
net-misc/wol
net-proxy/shadowsocks-libev
net-vpn/libreswan
net-vpn/strongswan
sci-libs/indilib
sys-apps/busybox
sys-apps/chname
sys-apps/flashrom
sys-apps/fwupd
sys-apps/hwinfo
sys-apps/iproute2
sys-apps/keyutils
sys-apps/linux-misc-apps
sys-apps/mount-idmapped
sys-apps/net-tools
sys-apps/shadow
sys-apps/systemd
sys-apps/systemd-readahead
sys-apps/systemd-utils
sys-auth/pam_mktemp
sys-block/blktrace
sys-block/fio
sys-block/libzbc
sys-block/libzbd
sys-block/open-iscsi
sys-cluster/corosync
sys-cluster/keepalived
sys-fs/btrfs-progs
sys-fs/cryptmount
sys-fs/jfsutils
sys-fs/nilfs-utils
sys-fs/udisks
sys-kernel/linux-headers
sys-libs/efivar
sys-libs/libcap
sys-libs/libcap-ng
sys-libs/libseccomp
sys-libs/liburing
sys-libs/mtdev
sys-power/acpid
sys-power/bbswitch
sys-process/audit
x11-drivers/xf86-input-evdev
x11-drivers/xf86-input-synaptics
x11-drivers/xf86-video-geode
x11-misc/xhkeys
x11-wm/mutter
%

then make sure the big one:

sys-libs/glibc