# git rev-parse -q --verify a4aebe936554dac6a91e5d091179c934f8325708^{commit}
a4aebe936554dac6a91e5d091179c934f8325708
already have revision, skipping fetch
# git checkout -q -f -B kisskb a4aebe936554dac6a91e5d091179c934f8325708
# git clean -qxdf
# < git log -1
# commit a4aebe936554dac6a91e5d091179c934f8325708
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Dec 19 15:26:59 2023 -0800
# 
#     posix-timers: Get rid of [COMPAT_]SYS_NI() uses
#     
#     Only the posix timer system calls use this (when the posix timer support
#     is disabled, which does not actually happen in any normal case), because
#     they had debug code to print out a warning about missing system calls.
#     
#     Get rid of that special case, and just use the standard COND_SYSCALL
#     interface that creates weak system call stubs that return -ENOSYS for
#     when the system call does not exist.
#     
#     This fixes a kCFI issue with the SYS_NI() hackery:
#     
#       CFI failure at int80_emulation+0x67/0xb0 (target: sys_ni_posix_timers+0x0/0x70; expected type: 0xb02b34d9)
#       WARNING: CPU: 0 PID: 48 at int80_emulation+0x67/0xb0
#     
#     Reported-by: kernel test robot <oliver.sang@intel.com>
#     Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
#     Tested-by: Sami Tolvanen <samitolvanen@google.com>
#     Cc: Thomas Gleixner <tglx@linutronix.de>
#     Cc: Dave Hansen <dave.hansen@linux.intel.com>
#     Cc: Borislav Petkov <bp@alien8.de>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/xtensa-linux/bin/xtensa-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/xtensa-linux/bin/xtensa-linux-ld --version
# < git log --format=%s --max-count=1 a4aebe936554dac6a91e5d091179c934f8325708
# make -s -j 32 ARCH=xtensa O=/kisskb/build/linus_defconfig_xtensa-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/xtensa-linux/bin/xtensa-linux-  defconfig
# < make -s -j 32 ARCH=xtensa O=/kisskb/build/linus_defconfig_xtensa-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/xtensa-linux/bin/xtensa-linux-  help
# make -s -j 32 ARCH=xtensa O=/kisskb/build/linus_defconfig_xtensa-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/xtensa-linux/bin/xtensa-linux-  olddefconfig
# make -s -j 32 ARCH=xtensa O=/kisskb/build/linus_defconfig_xtensa-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/xtensa-linux/bin/xtensa-linux-  
Completed OK
# rm -rf /kisskb/build/linus_defconfig_xtensa-gcc11
# Build took: 0:00:30.543778