# git rev-parse -q --verify 2abd839aa7e615f2bbc50c8ba7deb9e40d186768^{commit}
2abd839aa7e615f2bbc50c8ba7deb9e40d186768
already have revision, skipping fetch
# git checkout -q -f -B kisskb 2abd839aa7e615f2bbc50c8ba7deb9e40d186768
# git clean -qxdf
# < git log -1
# commit 2abd839aa7e615f2bbc50c8ba7deb9e40d186768
# Author: Catalin Marinas <catalin.marinas@arm.com>
# Date:   Fri Oct 4 14:46:24 2019 +0100
# 
#     kmemleak: Do not corrupt the object_list during clean-up
#     
#     In case of an error (e.g. memory pool too small), kmemleak disables
#     itself and cleans up the already allocated metadata objects. However, if
#     this happens early before the RCU callback mechanism is available,
#     put_object() skips call_rcu() and frees the object directly. This is not
#     safe with the RCU list traversal in __kmemleak_do_cleanup().
#     
#     Change the list traversal in __kmemleak_do_cleanup() to
#     list_for_each_entry_safe() and remove the rcu_read_{lock,unlock} since
#     the kmemleak is already disabled at this point. In addition, avoid an
#     unnecessary metadata object rb-tree look-up since it already has the
#     struct kmemleak_object pointer.
#     
#     Fixes: c5665868183f ("mm: kmemleak: use the memory pool for early allocations")
#     Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
#     Reported-by: Marc Dionne <marc.c.dionne@gmail.com>
#     Reported-by: Ted Ts'o <tytso@mit.edu>
#     Cc: Andrew Morton <akpm@linux-foundation.org>
#     Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-ld --version
# < git log --format=%s --max-count=1 2abd839aa7e615f2bbc50c8ba7deb9e40d186768
# < make -s -j 80 ARCH=s390 O=/kisskb/build/linus_s390-allnoconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  allnoconfig
# make -s -j 80 ARCH=s390 O=/kisskb/build/linus_s390-allnoconfig_s390x CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/s390x-linux/bin/s390x-linux-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/linus_s390-allnoconfig_s390x
# Build took: 0:00:16.437850