# git rev-parse -q --verify b08968f196d498b19e9d0841d76a03862258f2d8^{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 b08968f196d498b19e9d0841d76a03862258f2d8^{commit}
b08968f196d498b19e9d0841d76a03862258f2d8
# git checkout -q -f -B kisskb b08968f196d498b19e9d0841d76a03862258f2d8
# git clean -qxdf
# < git log -1
# commit b08968f196d498b19e9d0841d76a03862258f2d8
# Author: David Howells <dhowells@redhat.com>
# Date:   Thu Mar 3 13:05:18 2022 +0000
# 
#     cachefiles: Fix incorrect length to fallocate()
#     
#     When cachefiles_shorten_object() calls fallocate() to shape the cache
#     file to match the DIO size, it passes the total file size it wants to
#     achieve, not the amount of zeros that should be inserted.  Since this is
#     meant to preallocate that amount of storage for the file, it can cause
#     the cache to fill up the disk and hit ENOSPC.
#     
#     Fix this by passing the length actually required to go from the current
#     EOF to the desired EOF.
#     
#     Fixes: 7623ed6772de ("cachefiles: Implement cookie resize for truncate")
#     Reported-by: Jeffle Xu <jefflexu@linux.alibaba.com>
#     Signed-off-by: David Howells <dhowells@redhat.com>
#     Tested-by: Jeff Layton <jlayton@kernel.org>
#     Reviewed-by: Jeff Layton <jlayton@kernel.org>
#     cc: linux-cachefs@redhat.com
#     Link: https://lore.kernel.org/r/164630854858.3665356.17419701804248490708.stgit@warthog.procyon.org.uk # v1
#     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 b08968f196d498b19e9d0841d76a03862258f2d8
# < make -s -j 48 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 48 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 48 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:6226:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
# make -s -j 48 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-  
Completed OK
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc8
# Build took: 0:04:24.864907