# git rev-parse -q --verify b9ee5e04fd77898208c51b1395fa0b5e8536f9b6^{commit}
b9ee5e04fd77898208c51b1395fa0b5e8536f9b6
already have revision, skipping fetch
# git checkout -q -f -B kisskb b9ee5e04fd77898208c51b1395fa0b5e8536f9b6
# git clean -qxdf
# < git log -1
# commit b9ee5e04fd77898208c51b1395fa0b5e8536f9b6
# 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")
#     Fixes: ed1cd6deb013 ("powerpc: Activate CONFIG_THREAD_INFO_IN_TASK")
#     Cc: stable@vger.kernel.org # v5.1+
#     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 b9ee5e04fd77898208c51b1395fa0b5e8536f9b6
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pmac32_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  pmac32_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pmac32_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
In file included from /kisskb/src/sound/ppc/pmac.h:12:0,
                 from /kisskb/src/sound/ppc/awacs.c:16:
/kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init':
/kisskb/src/include/sound/control.h:208:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized]
  return _snd_ctl_add_slave(master, slave, 0);
         ^
/kisskb/src/sound/ppc/awacs.c:873:36: note: 'speaker_vol' was declared here
  struct snd_kcontrol *master_vol, *speaker_vol;
                                    ^
/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;
      ^
INFO: Uncompressed kernel (size 0x8b8948) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x900000)
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_pmac32_defconfig_powerpc-gcc5
# Build took: 0:01:27.203626