# git rev-parse -q --verify 0bcfe68b876748762557797a940d0a82de700629^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
warning: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log.
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

# git rev-parse -q --verify 0bcfe68b876748762557797a940d0a82de700629^{commit}
0bcfe68b876748762557797a940d0a82de700629
# git checkout -q -f -B kisskb 0bcfe68b876748762557797a940d0a82de700629
# git clean -qxdf
# < git log -1
# commit 0bcfe68b876748762557797a940d0a82de700629
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Tue Sep 7 11:26:23 2021 -0700
# 
#     Revert "memcg: enable accounting for pollfd and select bits arrays"
#     
#     This reverts commit b655843444152c0a14b749308e4cb35d91cbcf0b.
#     
#     Just like with the memcg lock accounting, the kernel test robot reports
#     a sizeable performance regression for this commit, and while it clearly
#     does the rigth thing in theory, we'll need to look at just how to avoid
#     or minimize the performance overhead of the memcg accounting.
#     
#     People already have suggestions on how to do that, but it's "future
#     work".
#     
#     So revert it for now.
#     
#     [ Note: the first link below is for this same commit but a different
#       commit ID, because it's the kernel test robot ended up noticing it in
#       Andrew Morton's patch queue ]
#     
#     Link: https://lore.kernel.org/lkml/20210905132732.GC15026@xsang-OptiPlex-9020/
#     Link: https://lore.kernel.org/lkml/20210907150757.GE17617@xsang-OptiPlex-9020/
#     Acked-by: Jens Axboe <axboe@kernel.dk>
#     Acked-by: Shakeel Butt <shakeelb@google.com>
#     Acked-by: Roman Gushchin <guro@fb.com>
#     Cc: Tejun Heo <tj@kernel.org>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 0bcfe68b876748762557797a940d0a82de700629
# < make -s -j 32 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  randconfig
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# < make -s -j 32 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  help
# make -s -j 32 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  olddefconfig
.config:5592:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
# make -s -j 32 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  
/kisskb/src/arch/arm64/kvm/hyp/nvhe/Makefile:58: FORCE prerequisite is missing
/kisskb/src/kernel/trace/trace_osnoise.c: In function 'start_kthread':
/kisskb/src/kernel/trace/trace_osnoise.c:1515:8: error: 'main' is usually a function [-Werror=main]
  void *main = osnoise_main;
        ^~~~
cc1: all warnings being treated as errors
make[3]: *** [/kisskb/src/scripts/Makefile.build:277: kernel/trace/trace_osnoise.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[2]: *** [/kisskb/src/scripts/Makefile.build:540: kernel/trace] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1872: kernel] Error 2
make[1]: *** Waiting for unfinished jobs....
/kisskb/src/drivers/thunderbolt/test.c: In function 'tb_test_credit_alloc_dma_multiple':
/kisskb/src/drivers/thunderbolt/test.c:2207:1: error: the frame size of 3152 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
 }
 ^
cc1: all warnings being treated as errors
make[3]: *** [/kisskb/src/scripts/Makefile.build:277: drivers/thunderbolt/test.o] Error 1
make[2]: *** [/kisskb/src/scripts/Makefile.build:540: drivers/thunderbolt] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1872: drivers] Error 2
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 32 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8
# Build took: 0:05:37.407598