# git rev-parse -q --verify a4ce02525e07d189398dec59a722174bd73679be^{commit}
a4ce02525e07d189398dec59a722174bd73679be
already have revision, skipping fetch
# git checkout -q -f -B kisskb a4ce02525e07d189398dec59a722174bd73679be
# git clean -qxdf
# < git log -1
# commit a4ce02525e07d189398dec59a722174bd73679be
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Thu Aug 8 12:48:26 2019 +0000
# 
#     powerpc/64e: Drop stale call to smp_processor_id() which hangs SMP startup
#     
#     Commit ebb9d30a6a74 ("powerpc/mm: any thread in one core can be the
#     first to setup TLB1") removed the need to know the cpu_id in
#     early_init_this_mmu(), but the call to smp_processor_id() which was
#     marked __maybe_used remained.
#     
#     Since commit ed1cd6deb013 ("powerpc: Activate
#     CONFIG_THREAD_INFO_IN_TASK") thread_info cannot be reached before MMU
#     is properly set up.
#     
#     Drop this stale call to smp_processor_id() which makes SMP hang
#     when CONFIG_PREEMPT is set.
#     
#     Fixes: ebb9d30a6a74 ("powerpc/mm: any thread in one core can be the first to setup TLB1")
#     Cc: stable@vger.kernel.org # v4.6+
#     Reported-by: Chris Packham <Chris.Packham@alliedtelesis.co.nz>
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     Tested-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/bef479514f4c08329fa649f67735df8918bc0976.1565268248.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 a4ce02525e07d189398dec59a722174bd73679be
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_le_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  pseries_le_defconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/powerpc-next_pseries_le_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/kernel/futex.c: In function 'do_futex':
/kisskb/src/kernel/futex.c:1676:17: warning: 'oldval' may be used uninitialized in this function [-Wmaybe-uninitialized]
   return oldval == cmparg;
                 ^
/kisskb/src/kernel/futex.c:1651:6: note: 'oldval' was declared here
  int oldval, ret;
      ^
WARNING: vmlinux.o(.text+0x31fc): Section mismatch in reference from the variable __boot_from_prom to the function .init.text:prom_init()
The function __boot_from_prom() references
the function __init prom_init().
This is often because __boot_from_prom lacks a __init 
annotation or the annotation of prom_init is wrong.

WARNING: vmlinux.o(.text+0x33d0): 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_pseries_le_defconfig_ppc64le-gcc5
# Build took: 0:02:59.729729