# git rev-parse -q --verify 5bbb336ba75d95611a7b9456355b48705016bdb1^{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 5bbb336ba75d95611a7b9456355b48705016bdb1^{commit}
5bbb336ba75d95611a7b9456355b48705016bdb1
# git checkout -q -f -B kisskb 5bbb336ba75d95611a7b9456355b48705016bdb1
# git clean -qxdf
# < git log -1
# commit 5bbb336ba75d95611a7b9456355b48705016bdb1
# Merge: 9820b4dca0f9 0b81e80c813f
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Feb 21 11:10:39 2021 -0800
# 
#     Merge tag 'for-5.12/io_uring-2021-02-17' of git://git.kernel.dk/linux-block
#     
#     Pull io_uring updates from Jens Axboe:
#      "Highlights from this cycles are things like request recycling and
#       task_work optimizations, which net us anywhere from 10-20% of speedups
#       on workloads that mostly are inline.
#     
#       This work was originally done to put io_uring under memcg, which adds
#       considerable overhead. But it's a really nice win as well. Also worth
#       highlighting is the LOOKUP_CACHED work in the VFS, and using it in
#       io_uring. Greatly speeds up the fast path for file opens.
#     
#       Summary:
#     
#        - Put io_uring under memcg protection. We accounted just the rings
#          themselves under rlimit memlock before, now we account everything.
#     
#        - Request cache recycling, persistent across invocations (Pavel, me)
#     
#        - First part of a cleanup/improvement to buffer registration (Bijan)
#     
#        - SQPOLL fixes (Hao)
#     
#        - File registration NULL pointer fixup (Dan)
#     
#        - LOOKUP_CACHED support for io_uring
#     
#        - Disable /proc/thread-self/ for io_uring, like we do for /proc/self
#     
#        - Add Pavel to the io_uring MAINTAINERS entry
#     
#        - Tons of code cleanups and optimizations (Pavel)
#     
#        - Support for skip entries in file registration (Noah)"
#     
#     * tag 'for-5.12/io_uring-2021-02-17' of git://git.kernel.dk/linux-block: (103 commits)
#       io_uring: tctx->task_lock should be IRQ safe
#       proc: don't allow async path resolution of /proc/thread-self components
#       io_uring: kill cached requests from exiting task closing the ring
#       io_uring: add helper to free all request caches
#       io_uring: allow task match to be passed to io_req_cache_free()
#       io-wq: clear out worker ->fs and ->files
#       io_uring: optimise io_init_req() flags setting
#       io_uring: clean io_req_find_next() fast check
#       io_uring: don't check PF_EXITING from syscall
#       io_uring: don't split out consume out of SQE get
#       io_uring: save ctx put/get for task_work submit
#       io_uring: don't duplicate io_req_task_queue()
#       io_uring: optimise SQPOLL mm/files grabbing
#       io_uring: optimise out unlikely link queue
#       io_uring: take compl state from submit state
#       io_uring: inline io_complete_rw_common()
#       io_uring: move res check out of io_rw_reissue()
#       io_uring: simplify iopoll reissuing
#       io_uring: clean up io_req_free_batch_finish()
#       io_uring: move submit side state closer in the ring
#       ...
# < /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 5bbb336ba75d95611a7b9456355b48705016bdb1
# < make -s -j 48 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=0x41C9B080
# 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
# < make -s -j 48 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-  help
# make -s -j 48 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-  olddefconfig
.config:6818:warning: override: reassigning to symbol STANDALONE
.config:6819:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
.config:6821:warning: override: reassigning to symbol GCC_PLUGINS
# make -s -j 48 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-  
Completed OK
# rm -rf /kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8
# Build took: 0:06:22.490309