# git rev-parse -q --verify 17c743b9da9e0d073ff19fd5313f521744514939^{commit}
# git fetch -q -n -f https://github.com/linuxppc/linux next-test
# git rev-parse -q --verify 17c743b9da9e0d073ff19fd5313f521744514939^{commit}
17c743b9da9e0d073ff19fd5313f521744514939
# git checkout -q -f -B kisskb 17c743b9da9e0d073ff19fd5313f521744514939
# git clean -qxdf
# < git log -1
# commit 17c743b9da9e0d073ff19fd5313f521744514939
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Mon May 20 16:26:47 2024 +1000
# 
#     selftests/sigaltstack: Fix ppc64 GCC build
#     
#     Building the sigaltstack test with GCC on 64-bit powerpc errors with:
#     
#       gcc -Wall     sas.c  -o /home/michael/linux/.build/kselftest/sigaltstack/sas
#       In file included from sas.c:23:
#       current_stack_pointer.h:22:2: error: #error "implement current_stack_pointer equivalent"
#          22 | #error "implement current_stack_pointer equivalent"
#             |  ^~~~~
#       sas.c: In function ‘my_usr1’:
#       sas.c:50:13: error: ‘sp’ undeclared (first use in this function); did you mean ‘p’?
#          50 |         if (sp < (unsigned long)sstack ||
#             |             ^~
#     
#     This happens because GCC doesn't define __ppc__ for 64-bit builds, only
#     32-bit builds. Instead use __powerpc__ to detect powerpc builds, which
#     is defined by clang and GCC for 64-bit and 32-bit builds.
#     
#     Fixes: 05107edc9101 ("selftests: sigaltstack: fix -Wuninitialized")
#     Cc: stable@vger.kernel.org # v6.3+
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://msgid.link/20240520062647.688667-1-mpe@ellerman.id.au
# < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/m68k-linux/bin/m68k-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/m68k-linux/bin/m68k-linux-ld --version
# < git log --format=%s --max-count=1 17c743b9da9e0d073ff19fd5313f521744514939
# make -s -j 40 ARCH=m68k O=/kisskb/build/powerpc-next_defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/m68k-linux/bin/m68k-linux-  defconfig
# < make -s -j 40 ARCH=m68k O=/kisskb/build/powerpc-next_defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/m68k-linux/bin/m68k-linux-  help
# make -s -j 40 ARCH=m68k O=/kisskb/build/powerpc-next_defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/m68k-linux/bin/m68k-linux-  olddefconfig
# make -s -j 40 ARCH=m68k O=/kisskb/build/powerpc-next_defconfig_m68k-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/m68k-linux/bin/m68k-linux-  
Completed OK
# rm -rf /kisskb/build/powerpc-next_defconfig_m68k-gcc11
# Build took: 0:01:15.949745