# git rev-parse -q --verify d0473f978e61557464daa8547008fa2cd0c63a17^{commit}
d0473f978e61557464daa8547008fa2cd0c63a17
already have revision, skipping fetch
# git checkout -q -f -B kisskb d0473f978e61557464daa8547008fa2cd0c63a17
# git clean -qxdf
# < git log -1
# commit d0473f978e61557464daa8547008fa2cd0c63a17
# Merge: 58130235bfcc a3d46aea46f9
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Fri Apr 26 09:46:46 2019 -0700
# 
#     Merge tag 'for-5.1-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
#     
#     Pull btrfs fix from David Sterba:
#      "One patch to fix a crash in io submission path, due to memory
#       allocation errors.
#     
#       In short, the multipage bio work that landed in 5.1 caused larger bios
#       that in turn require larger temporary memory for checksums. The patch
#       is a workaround, we're going to rework the allocation so it does not
#       require the vmalloc fallback.
#     
#       It took a while to identify that it's caused by patches in 5.1 and not
#       a patchset that did some changes in error handling in the code. I've
#       tested it on various memory/cpu combinations, it could hit OOM but
#       does not crash.
#     
#       The timestamp of the patch is less than a day due to updates in the
#       changelog, tests were running meanwhile"
#     
#     * tag 'for-5.1-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
#       btrfs: Switch memory allocations in async csum calculation path to kvmalloc
# < /opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-gcc --version
# < /opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-ld --version
# < git log --format=%s --max-count=1 d0473f978e61557464daa8547008fa2cd0c63a17
# < make -s -j 120 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32 CROSS_COMPILE=/opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-  or1ksim_defconfig
# make -s -j 120 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32 CROSS_COMPILE=/opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-  
/kisskb/src/mm/mprotect.c: In function 'change_pte_range':
/kisskb/src/mm/mprotect.c:42:20: warning: unused variable 'mm' [-Wunused-variable]
  struct mm_struct *mm = vma->vm_mm;
                    ^
Completed OK
# rm -rf /kisskb/build/linus_or1ksim_defconfig_or32
# Build took: 0:00:14.516716