# git rev-parse -q --verify 5e45834c3b34d6321f70a5267533e632bf8e773a^{commit}
5e45834c3b34d6321f70a5267533e632bf8e773a
already have revision, skipping fetch
# git checkout -q -f -B kisskb 5e45834c3b34d6321f70a5267533e632bf8e773a
# git clean -qxdf
# < git log -1
# commit 5e45834c3b34d6321f70a5267533e632bf8e773a
# Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
# Date:   Fri Feb 19 17:56:48 2021 +0100
# 
#     powerpc/mm: Move the linear_mapping_mutex to the ifdef where it is used
#     
#     The mutex linear_mapping_mutex is defined at the of the file while its
#     only two user are within the CONFIG_MEMORY_HOTPLUG block.
#     A compile without CONFIG_MEMORY_HOTPLUG set fails on PREEMPT_RT because
#     its mutex implementation is smart enough to realize that it is unused.
#     
#     Move the definition of linear_mapping_mutex to ifdef block where it is
#     used.
#     
#     Fixes: 1f73ad3e8d755 ("powerpc/mm: print warning in arch_remove_linear_mapping()")
#     Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20210219165648.2505482-1-bigeasy@linutronix.de
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 5e45834c3b34d6321f70a5267533e632bf8e773a
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  40x/walnut_defconfig
# < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/block/genhd.c: In function 'diskstats_show':
/kisskb/src/block/genhd.c:1314:1: warning: the frame size of 1160 bytes is larger than 1024 bytes [-Wframe-larger-than=]
 }
 ^
Completed OK
# rm -rf /kisskb/build/powerpc-next_40x_walnut_defconfig_powerpc-gcc4.9
# Build took: 0:00:28.180584