# git rev-parse -q --verify 625434dafdd97372d15de21972be4b682709e854^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify 625434dafdd97372d15de21972be4b682709e854^{commit}
625434dafdd97372d15de21972be4b682709e854
# git checkout -q -f -B kisskb 625434dafdd97372d15de21972be4b682709e854
# git clean -qxdf
# < git log -1
# commit 625434dafdd97372d15de21972be4b682709e854
# Merge: c05a182bf456 7b289c38335e
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Apr 28 14:56:09 2021 -0700
# 
#     Merge tag 'for-5.13/io_uring-2021-04-27' of git://git.kernel.dk/linux-block
#     
#     Pull io_uring updates from Jens Axboe:
#     
#      - Support for multi-shot mode for POLL requests
#     
#      - More efficient reference counting. This is shamelessly stolen from
#        the mm side. Even though referencing is mostly single/dual user, the
#        128 count was retained to keep the code the same. Maybe this
#        should/could be made generic at some point.
#     
#      - Removal of the need to have a manager thread for each ring. The
#        manager threads only job was checking and creating new io-threads as
#        needed, instead we handle this from the queue path.
#     
#      - Allow SQPOLL without CAP_SYS_ADMIN or CAP_SYS_NICE. Since 5.12, this
#        thread is "just" a regular application thread, so no need to restrict
#        use of it anymore.
#     
#      - Cleanup of how internal async poll data lifetime is managed.
#     
#      - Fix for syzbot reported crash on SQPOLL cancelation.
#     
#      - Make buffer registration more like file registrations, which includes
#        flexibility in avoiding full set unregistration and re-registration.
#     
#      - Fix for io-wq affinity setting.
#     
#      - Be a bit more defensive in task->pf_io_worker setup.
#     
#      - Various SQPOLL fixes.
#     
#      - Cleanup of SQPOLL creds handling.
#     
#      - Improvements to in-flight request tracking.
#     
#      - File registration cleanups.
#     
#      - Tons of cleanups and little fixes
#     
#     * tag 'for-5.13/io_uring-2021-04-27' of git://git.kernel.dk/linux-block: (156 commits)
#       io_uring: maintain drain logic for multishot poll requests
#       io_uring: Check current->io_uring in io_uring_cancel_sqpoll
#       io_uring: fix NULL reg-buffer
#       io_uring: simplify SQPOLL cancellations
#       io_uring: fix work_exit sqpoll cancellations
#       io_uring: Fix uninitialized variable up.resv
#       io_uring: fix invalid error check after malloc
#       io_uring: io_sq_thread() no longer needs to reset current->pf_io_worker
#       kernel: always initialize task->pf_io_worker to NULL
#       io_uring: update sq_thread_idle after ctx deleted
#       io_uring: add full-fledged dynamic buffers support
#       io_uring: implement fixed buffers registration similar to fixed files
#       io_uring: prepare fixed rw for dynanic buffers
#       io_uring: keep table of pointers to ubufs
#       io_uring: add generic rsrc update with tags
#       io_uring: add IORING_REGISTER_RSRC
#       io_uring: enumerate dynamic resources
#       io_uring: add generic path for rsrc update
#       io_uring: preparation for rsrc tagging
#       io_uring: decouple CQE filling from requests
#       ...
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 625434dafdd97372d15de21972be4b682709e854
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  randconfig
KCONFIG_SEED=0x5649A21C
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  help
# make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  olddefconfig
# make -s -j 24 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
arch/arm64/Makefile:25: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
arch/arm64/Makefile:25: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
Completed OK
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc5.4
# Build took: 0:07:32.362253