# git rev-parse -q --verify 8659a0e0efdd975c73355dbc033f79ba3b31e82c^{commit}
8659a0e0efdd975c73355dbc033f79ba3b31e82c
already have revision, skipping fetch
# git checkout -q -f -B kisskb 8659a0e0efdd975c73355dbc033f79ba3b31e82c
# git clean -qxdf
# < git log -1
# commit 8659a0e0efdd975c73355dbc033f79ba3b31e82c
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Wed May 20 23:36:05 2020 +1000
# 
#     powerpc/64s: Disable STRICT_KERNEL_RWX
#     
#     Several strange crashes have been eventually traced back to
#     STRICT_KERNEL_RWX and its interaction with code patching.
#     
#     Various paths in our ftrace, kprobes and other patching code need to
#     be hardened against patching failures, otherwise we can end up running
#     with partially/incorrectly patched ftrace paths, kprobes or jump
#     labels, which can then cause strange crashes.
#     
#     Although fixes for those are in development, they're not -rc material.
#     
#     There also seem to be problems with the underlying strict RWX logic,
#     which needs further debugging.
#     
#     So for now disable STRICT_KERNEL_RWX on 64-bit to prevent people from
#     enabling the option and tripping over the bugs.
#     
#     Fixes: 1e0fc9d1eb2b ("powerpc/Kconfig: Enable STRICT_KERNEL_RWX for some configs")
#     Cc: stable@vger.kernel.org # v4.13+
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20200520133605.972649-1-mpe@ellerman.id.au
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 8659a0e0efdd975c73355dbc033f79ba3b31e82c
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+NO_TM_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc64_defconfig
# Added to kconfig CONFIG_PPC_TRANSACTIONAL_MEM=n
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+NO_TM_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+NO_TM_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-fixes_ppc64_defconfig+NO_TM_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/fs/btrfs/backref.c: In function 'is_shared_data_backref':
/kisskb/src/fs/btrfs/backref.c:394:9: warning: missing braces around initializer [-Wmissing-braces]
  struct prelim_ref target = {0};
         ^
/kisskb/src/fs/btrfs/backref.c:394:9: warning: (near initialization for 'target.rbnode') [-Wmissing-braces]
/kisskb/src/kernel/trace/ftrace.c: In function 'pid_open':
/kisskb/src/kernel/trace/ftrace.c:7166:6: warning: 'seq_ops' may be used uninitialized in this function [-Wmaybe-uninitialized]
  ret = seq_open(file, seq_ops);
      ^
/kisskb/src/kernel/trace/ftrace.c: In function 'pid_write':
/kisskb/src/kernel/trace/ftrace.c:7244:8: warning: 'filtered_pids' may be used uninitialized in this function [-Wmaybe-uninitialized]
  ret = trace_pid_write(filtered_pids, &pid_list, ubuf, cnt);
        ^
/kisskb/src/kernel/trace/ftrace.c:7261:22: warning: 'other_pids' may be used uninitialized in this function [-Wmaybe-uninitialized]
  } else if (pid_list && !other_pids) {
                      ^
/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:1652:6: note: 'oldval' was declared here
  int oldval, ret;
      ^
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_ppc64_defconfig+NO_TM_powerpc-gcc4.9
# Build took: 0:04:00.326868