# git rev-parse -q --verify c64396cc36c6e60704ab06c1fb1c4a46179c9120^{commit}
c64396cc36c6e60704ab06c1fb1c4a46179c9120
already have revision, skipping fetch
# git checkout -q -f -B kisskb c64396cc36c6e60704ab06c1fb1c4a46179c9120
# git clean -qxdf
# < git log -1
# commit c64396cc36c6e60704ab06c1fb1c4a46179c9120
# Merge: e5ff2cb9cf67 34b1a1ce1458
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu Jan 28 11:18:43 2021 -0800
# 
#     Merge tag 'locking-urgent-2021-01-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
#     
#     Pull locking fixes from Thomas Gleixner:
#      "A set of PI futex fixes:
#     
#        - Address a longstanding issue where the user space part of the PI
#          futex is not writeable. The kernel returns with inconsistent state
#          which can in the worst case result in a UAF of a tasks kernel
#          stack.
#     
#          The solution is to establish consistent kernel state which makes
#          future operations on the futex fail because user space and kernel
#          space state are inconsistent. Not a problem as PI futexes
#          fundamentaly require a functional RW mapping and if user space
#          pulls the rug under it, then it can keep the pieces it asked for.
#     
#        - Address an issue where the return value is incorrect in case that
#          the futex was acquired after a timeout/signal made the waiter drop
#          out of the rtmutex wait.
#     
#          In one of the corner cases the kernel returned an error code
#          despite having successfully acquired the futex"
#     
#     * tag 'locking-urgent-2021-01-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
#       futex: Handle faults correctly for PI futexes
#       futex: Simplify fixup_pi_state_owner()
#       futex: Use pi_state_update_owner() in put_pi_state()
#       rtmutex: Remove unused argument from rt_mutex_proxy_unlock()
#       futex: Provide and use pi_state_update_owner()
#       futex: Replace pointless printk in fixup_owner()
#       futex: Ensure the correct return value from futex_lock_pi()
# < /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 c64396cc36c6e60704ab06c1fb1c4a46179c9120
# < make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_ppc64_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  ppc64_defconfig
# < make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_ppc64_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_ppc64_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_ppc64_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/drivers/net/ethernet/chelsio/cxgb4/sge.c: In function 'cxgb4_write_partial_sgl':
/kisskb/src/drivers/net/ethernet/chelsio/cxgb4/sge.c:910:9: warning: missing braces around initializer [-Wmissing-braces]
  struct ulptx_sge_pair buf[MAX_SKB_FRAGS / 2 + 1] = {0}, *to;
         ^
/kisskb/src/drivers/net/ethernet/chelsio/cxgb4/sge.c:910:9: warning: (near initialization for 'buf[0]') [-Wmissing-braces]
/kisskb/src/fs/btrfs/tree-checker.c: In function 'check_root_item':
/kisskb/src/fs/btrfs/tree-checker.c:1071:9: warning: missing braces around initializer [-Wmissing-braces]
  struct btrfs_root_item ri = { 0 };
         ^
/kisskb/src/fs/btrfs/tree-checker.c:1071:9: warning: (near initialization for 'ri.inode') [-Wmissing-braces]
Completed OK
# rm -rf /kisskb/build/linus_ppc64_defconfig_powerpc-gcc4.9
# Build took: 0:04:20.651937