# git rev-parse -q --verify ad910e36da4ca3a1bd436989f632d062dda0c921^{commit}
ad910e36da4ca3a1bd436989f632d062dda0c921
already have revision, skipping fetch
# git checkout -q -f -B kisskb ad910e36da4ca3a1bd436989f632d062dda0c921
# git clean -qxdf
# < git log -1
# commit ad910e36da4ca3a1bd436989f632d062dda0c921
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sat Dec 7 10:41:17 2019 -0800
# 
#     pipe: fix poll/select race introduced by the pipe rework
#     
#     The kernel wait queues have a basic rule to them: you add yourself to
#     the wait-queue first, and then you check the things that you're going to
#     wait on.  That avoids the races with the event you're waiting for.
#     
#     The same goes for poll/select logic: the "poll_wait()" goes first, and
#     then you check the things you're polling for.
#     
#     Of course, if you use locking, the ordering doesn't matter since the
#     lock will serialize with anything that changes the state you're looking
#     at. That's not the case here, though.
#     
#     So move the poll_wait() first in pipe_poll(), before you start looking
#     at the pipe state.
#     
#     Fixes: 8cefc107ca54 ("pipe: Use head and tail pointers for the ring, not cursor and length")
#     Cc: David Howells <dhowells@redhat.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 ad910e36da4ca3a1bd436989f632d062dda0c921
# < make -s -j 32 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  randconfig
KCONFIG_SEED=0xEE8BB0AA

WARNING: unmet direct dependencies detected for THERMAL_GOV_POWER_ALLOCATOR
  Depends on [n]: THERMAL [=y] && ENERGY_MODEL [=n]
  Selected by [y]:
  - THERMAL_DEFAULT_GOV_POWER_ALLOCATOR [=y] && <choice>
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n
# Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n
# Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n
# yes \n | make -s -j 32 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 32 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  

WARNING: unmet direct dependencies detected for THERMAL_GOV_POWER_ALLOCATOR
  Depends on [n]: THERMAL [=y] && ENERGY_MODEL [=n]
  Selected by [y]:
  - THERMAL_DEFAULT_GOV_POWER_ALLOCATOR [=y] && <choice>

WARNING: unmet direct dependencies detected for THERMAL_GOV_POWER_ALLOCATOR
  Depends on [n]: THERMAL [=y] && ENERGY_MODEL [=n]
  Selected by [y]:
  - THERMAL_DEFAULT_GOV_POWER_ALLOCATOR [=y] && <choice>

WARNING: unmet direct dependencies detected for THERMAL_GOV_POWER_ALLOCATOR
  Depends on [n]: THERMAL [=y] && ENERGY_MODEL [=n]
  Selected by [y]:
  - THERMAL_DEFAULT_GOV_POWER_ALLOCATOR [=y] && <choice>
/kisskb/src/tools/objtool
Completed OK
# rm -rf /kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8
# Build took: 0:03:33.680069