# git rev-parse -q --verify 6266a4dadb1d0976490fdf5af4f7941e36f64e80^{commit}
6266a4dadb1d0976490fdf5af4f7941e36f64e80
already have revision, skipping fetch
# git checkout -q -f -B kisskb 6266a4dadb1d0976490fdf5af4f7941e36f64e80
# git clean -qxdf
# < git log -1
# commit 6266a4dadb1d0976490fdf5af4f7941e36f64e80
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Wed Nov 6 13:30:25 2019 +1100
# 
#     powerpc/64s: Always disable branch profiling for prom_init.o
#     
#     Otherwise the build fails because prom_init is calling symbols it's
#     not allowed to, eg:
#     
#       Error: External symbol 'ftrace_likely_update' referenced from prom_init.c
#       make[3]: *** [arch/powerpc/kernel/Makefile:197: arch/powerpc/kernel/prom_init_check] Error 1
#     
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20191106051129.7626-1-mpe@ellerman.id.au
# < /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 6266a4dadb1d0976490fdf5af4f7941e36f64e80
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_PERF_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_PERF_EVENTS=n
# yes \n | make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_PERF_ppc64le-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 24 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_PERF_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
In file included from /kisskb/src/include/linux/list.h:9:0,
                 from /kisskb/src/include/linux/wait.h:7,
                 from /kisskb/src/include/linux/wait_bit.h:8,
                 from /kisskb/src/include/linux/fs.h:6,
                 from /kisskb/src/fs/btrfs/send.c:7:
/kisskb/src/fs/btrfs/send.c: In function 'process_extent':
/kisskb/src/include/linux/kernel.h:37:33: warning: 'clone_src_i_size' may be used uninitialized in this function [-Wmaybe-uninitialized]
 #define IS_ALIGNED(x, a)  (((x) & ((typeof(x))(a) - 1)) == 0)
                                 ^
/kisskb/src/fs/btrfs/send.c:5088:6: note: 'clone_src_i_size' was declared here
  u64 clone_src_i_size;
      ^
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_PERF_ppc64le-gcc5
# Build took: 0:03:31.443055