# git rev-parse -q --verify feb8e960d780e170e992a70491eec9dd68f4dbf2^{commit}
feb8e960d780e170e992a70491eec9dd68f4dbf2
already have revision, skipping fetch
# git checkout -q -f -B kisskb feb8e960d780e170e992a70491eec9dd68f4dbf2
# git clean -qxdf
# < git log -1
# commit feb8e960d780e170e992a70491eec9dd68f4dbf2
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Fri Apr 17 11:58:36 2020 +0000
# 
#     powerpc/mm: Fix CONFIG_PPC_KUAP_DEBUG on PPC32
#     
#     CONFIG_PPC_KUAP_DEBUG is not selectable because it depends on PPC_32
#     which doesn't exists.
#     
#     Fixing it leads to a deadlock due to a vital register getting
#     clobbered in _switch().
#     
#     Change dependency to PPC32 and use r0 instead of r4 in _switch()
#     
#     Fixes: e2fb9f544431 ("powerpc/32: Prepare for Kernel Userspace Access Protection")
#     Cc: stable@vger.kernel.org # v5.2+
#     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/540242f7d4573f7cdf1b3bf46bb35f743b2cd68f.1587124651.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 feb8e960d780e170e992a70491eec9dd68f4dbf2
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+NO_MEMORY_HOTPLUG_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  pseries_defconfig
# Added to kconfig CONFIG_MEMORY_HOTPLUG=n
# Added to kconfig CONFIG_MEMORY_HOTREMOVE=n
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+NO_MEMORY_HOTPLUG_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+NO_MEMORY_HOTPLUG_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_pseries_defconfig+NO_MEMORY_HOTPLUG_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/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) {
                      ^
WARNING: modpost: vmlinux.o(.text.unlikely+0x2b0): Section mismatch in reference from the function .early_init_mmu() to the function .init.text:.radix__early_init_mmu()
The function .early_init_mmu() references
the function __init .radix__early_init_mmu().
This is often because .early_init_mmu lacks a __init 
annotation or the annotation of .radix__early_init_mmu is wrong.

WARNING: modpost: vmlinux.o(.text.unlikely+0x2bc): Section mismatch in reference from the function .early_init_mmu() to the function .init.text:.hash__early_init_mmu()
The function .early_init_mmu() references
the function __init .hash__early_init_mmu().
This is often because .early_init_mmu lacks a __init 
annotation or the annotation of .hash__early_init_mmu is wrong.

Completed OK
# rm -rf /kisskb/build/powerpc-fixes_pseries_defconfig+NO_MEMORY_HOTPLUG_powerpc-gcc5
# Build took: 0:02:46.505857