# git rev-parse -q --verify 416b2bfbaccf8fd50c8e77778bd47f95f12f13d9^{commit}
416b2bfbaccf8fd50c8e77778bd47f95f12f13d9
already have revision, skipping fetch
# git checkout -q -f -B kisskb 416b2bfbaccf8fd50c8e77778bd47f95f12f13d9
# git clean -qxdf
# < git log -1
# commit 416b2bfbaccf8fd50c8e77778bd47f95f12f13d9
# Author: Ram Pai <linuxram@us.ibm.com>
# Date:   Mon Dec 3 12:43:22 2018 -0800
# 
#     powerpc/pkeys: Copy pkey-tracking-information at fork()
#     
#     At fork(), the pkey tracking information is not copied over to the
#     mm_struct of the child. This can cause the child to erroneously
#     allocate keys that were already allocated. Any allocated execute-only
#     key is lost as well.
#     
#     Add code; called by dup_mmap(), to copy the pkey state from parent to
#     child explicitly.
#     
#     This problem was originally found by Dave Hansen on x86, which turns
#     out to be a problem on powerpc as well.
#     
#     Fixes: cf43d3b26452 ("powerpc: Enable pkey subsystem")
#     Cc: stable@vger.kernel.org # v4.16+
#     Signed-off-by: Ram Pai <linuxram@us.ibm.com>
#     Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
#     [mpe: Return early if pkey_disabled is true]
#     Signed-off-by: Michael Ellerman <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 416b2bfbaccf8fd50c8e77778bd47f95f12f13d9
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc64e_defconfig+UP_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc64e_defconfig
# Added to kconfig CONFIG_SMP=n
# yes \n | make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc64e_defconfig+UP_powerpc-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 48 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc64e_defconfig+UP_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
INFO: Uncompressed kernel (size 0xd358e0) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0xe00000)
Image Name:   Linux-4.20.0-rc2-g416b2bfbaccf
Created:      Fri Dec 21 03:22:55 2018
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    5678610 Bytes = 5545.52 KiB = 5.42 MiB
Load Address: 00000000
Entry Point:  00000000
Completed OK
# rm -rf /kisskb/build/powerpc-next_ppc64e_defconfig+UP_powerpc-gcc5
# Build took: 0:01:37.364861