# git rev-parse -q --verify 2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1^{commit}
2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1
already have revision, skipping fetch
# git checkout -q -f -B kisskb 2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1
# git clean -qxdf
# < git log -1
# commit 2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Mon Feb 6 14:22:40 2023 +1000
# 
#     powerpc/64s/interrupt: Fix interrupt exit race with security mitigation switch
#     
#     The RFI and STF security mitigation options can flip the
#     interrupt_exit_not_reentrant static branch condition concurrently with
#     the interrupt exit code which tests that branch.
#     
#     Interrupt exit tests this condition to set MSR[EE|RI] for exit, then
#     again in the case a soft-masked interrupt is found pending, to recover
#     the MSR so the interrupt can be replayed before attempting to exit
#     again. If the condition changes between these two tests, the MSR and irq
#     soft-mask state will become corrupted, leading to warnings and possible
#     crashes. For example, if the branch is initially true then false,
#     MSR[EE] will be 0 but PACA_IRQ_HARD_DIS clear and EE may not get
#     enabled, leading to warnings in irq_64.c.
#     
#     Fixes: 13799748b957 ("powerpc/64: use interrupt restart table to speed up return from interrupt")
#     Cc: stable@vger.kernel.org # v5.14+
#     Reported-by: Sachin Sant <sachinp@linux.ibm.com>
#     Tested-by: Sachin Sant <sachinp@linux.ibm.com>
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20230206042240.92103-1-npiggin@gmail.com
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 2ea31e2e62bbc4d11c411eeb36f1b02841dbcab1
# < make -s -j 160 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  defconfig
# < make -s -j 160 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  help
# make -s -j 160 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  olddefconfig
# make -s -j 160 ARCH=sparc64 O=/kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  
<stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp]
WARNING: modpost: EXPORT symbol "_mcount" [vmlinux] version generation failed, symbol will not be versioned.
Is "_mcount" prototyped in <asm/asm-prototypes.h>?
  kernel: arch/sparc/boot/image is ready
  kernel: arch/sparc/boot/zImage is ready
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_sparc64-defconfig_sparc64-gcc5
# Build took: 0:03:21.593879