# git rev-parse -q --verify ffc1c20c46f74e24c3f03147688b4af6e429654a^{commit}
ffc1c20c46f74e24c3f03147688b4af6e429654a
already have revision, skipping fetch
# git checkout -q -f -B kisskb ffc1c20c46f74e24c3f03147688b4af6e429654a
# git clean -qxdf
# < git log -1
# commit ffc1c20c46f74e24c3f03147688b4af6e429654a
# Merge: f365ab31efac 81d5553d1288
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Apr 1 15:33:12 2020 -0700
# 
#     Merge tag 'for-5.7/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
#     
#     Pull device mapper updates from Mike Snitzer:
#     
#      - Add DM writecache "cleaner" policy feature that allows cache to be
#        flushed while userspace monitors for completion to then discommision
#        use of caching.
#     
#      - Optimize DM writecache superblock writing and also yield CPU while
#        initializing writecache on large PMEM devices to avoid CPU stalls.
#     
#      - Various fixes to DM integrity target while preparing for the ability
#        to resize a DM integrity device. In addition to resize support, add
#        optional discard support with the "allow_discards" feature.
#     
#      - Fix DM clone target's discard handling and overflow bugs which could
#        cause data corruption.
#     
#      - Fix memory leak in destructor for DM verity FEC support.
#     
#      - Fix DM zoned target's redundant increment of nr_rnd_zones.
#     
#      - Small cleanup in DM crypt to use crypt_integrity_aead() helper.
#     
#     * tag 'for-5.7/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
#       dm clone metadata: Fix return type of dm_clone_nr_of_hydrated_regions()
#       dm clone: Add missing casts to prevent overflows and data corruption
#       dm clone: Add overflow check for number of regions
#       dm clone: Fix handling of partial region discards
#       dm writecache: add cond_resched to avoid CPU hangs
#       dm integrity: improve discard in journal mode
#       dm integrity: add optional discard support
#       dm integrity: allow resize of the integrity device
#       dm integrity: factor out get_provided_data_sectors()
#       dm integrity: don't replay journal data past the end of the device
#       dm integrity: remove sector type casts
#       dm integrity: fix a crash with unusually large tag size
#       dm zoned: remove duplicate nr_rnd_zones increase in dmz_init_zone()
#       dm verity fec: fix memory leak in verity_fec_dtr
#       dm writecache: optimize superblock write
#       dm writecache: implement gradual cleanup
#       dm writecache: implement the "cleaner" policy
#       dm writecache: do direct write if the cache is full
#       dm integrity: print device name in integrity_metadata() error message
#       dm crypt: use crypt_integrity_aead() helper
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 ffc1c20c46f74e24c3f03147688b4af6e429654a
# < make -s -j 8 ARCH=arm O=/kisskb/build/linus_mainstone_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  mainstone_defconfig
# < make -s -j 8 ARCH=arm O=/kisskb/build/linus_mainstone_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  help
# make -s -j 8 ARCH=arm O=/kisskb/build/linus_mainstone_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  olddefconfig
# make -s -j 8 ARCH=arm O=/kisskb/build/linus_mainstone_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  
/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/linus_mainstone_defconfig_arm-gcc4.9
# Build took: 0:01:33.701785