# git rev-parse -q --verify 14e3e989f6a5d9646b6cf60690499cc8bdc11f7d^{commit}
14e3e989f6a5d9646b6cf60690499cc8bdc11f7d
already have revision, skipping fetch
# git checkout -q -f -B kisskb 14e3e989f6a5d9646b6cf60690499cc8bdc11f7d
# git clean -qxdf
# < git log -1
# commit 14e3e989f6a5d9646b6cf60690499cc8bdc11f7d
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Dec 27 10:56:33 2020 -0800
# 
#     proc mountinfo: make splice available again
#     
#     Since commit 36e2c7421f02 ("fs: don't allow splice read/write without
#     explicit ops") we've required that file operation structures explicitly
#     enable splice support, rather than falling back to the default handlers.
#     
#     Most /proc files use the indirect 'struct proc_ops' to describe their
#     file operations, and were fixed up to support splice earlier in commits
#     40be821d627c..b24c30c67863, but the mountinfo files interact with the
#     VFS directly using their own 'struct file_operations' and got missed as
#     a result.
#     
#     This adds the necessary support for splice to work for /proc/*/mountinfo
#     and friends.
#     
#     Reported-by: Joan Bruguera Micó <joanbrugueram@gmail.com>
#     Reported-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
#     Link: https://bugzilla.kernel.org/show_bug.cgi?id=209971
#     Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
#     Cc: Christoph Hellwig <hch@lst.de>
#     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 14e3e989f6a5d9646b6cf60690499cc8bdc11f7d
# < make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus_x86_64-allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  allnoconfig
# < make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus_x86_64-allnoconfig_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_x86_64-allnoconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 48 ARCH=x86_64 O=/kisskb/build/linus_x86_64-allnoconfig_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_x86_64-allnoconfig_x86_64-gcc8
# Build took: 0:00:22.542521