# git rev-parse -q --verify 031d94b0f4799478367ec10babdd755123142ed6^{commit}
031d94b0f4799478367ec10babdd755123142ed6
already have revision, skipping fetch
# git checkout -q -f -B kisskb 031d94b0f4799478367ec10babdd755123142ed6
# git clean -qxdf
# < git log -1
# commit 031d94b0f4799478367ec10babdd755123142ed6
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Fri Jan 24 07:07:54 2020 +0000
# 
#     powerpc/irq: Use current_stack_pointer in do_IRQ()
#     
#     Until commit 7306e83ccf5c ("powerpc: Don't use CURRENT_THREAD_INFO to
#     find the stack"), the current stack base address was obtained by
#     calling current_thread_info(). That inline function was simply masking
#     out the value of r1.
#     
#     In that commit, it was changed to using current_stack_pointer() (since
#     renamed current_stack_frame()), which is a heavier function as it is
#     an outline assembly function which cannot be inlined and which reads
#     the content of the stack at 0(r1).
#     
#     Convert to using current_stack_pointer for geting r1 and masking out
#     its value to obtain the base address of the stack pointer as before.
#     
#     Fixes: 7306e83ccf5c ("powerpc: Don't use CURRENT_THREAD_INFO to find the stack")
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/a37e699e7ab897742c07b6838a08af33bc9217e3.1579849665.git.christophe.leroy@c-s.fr
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 031d94b0f4799478367ec10babdd755123142ed6
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_NUMA_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_NUMA=n
# yes \n | make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_NUMA_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_NUMA_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: vmlinux.o(.text+0x2fc8): Section mismatch in reference from the variable start_here_common to the function .init.text:start_kernel()
The function start_here_common() references
the function __init start_kernel().
This is often because start_here_common lacks a __init 
annotation or the annotation of start_kernel is wrong.

Completed OK
# rm -rf /kisskb/build/powerpc-next_powernv_defconfig+NO_NUMA_powerpc-gcc5
# Build took: 0:02:54.473685