# git rev-parse -q --verify b08968f196d498b19e9d0841d76a03862258f2d8^{commit}
b08968f196d498b19e9d0841d76a03862258f2d8
already have revision, skipping fetch
# 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-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 b08968f196d498b19e9d0841d76a03862258f2d8
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  skiroot_defconfig
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/arch/powerpc/kernel/stacktrace.c: In function 'handle_backtrace_ipi':
/kisskb/src/arch/powerpc/kernel/stacktrace.c:171:2: error: implicit declaration of function 'nmi_cpu_backtrace' [-Werror=implicit-function-declaration]
  nmi_cpu_backtrace(regs);
  ^
/kisskb/src/arch/powerpc/kernel/stacktrace.c: In function 'arch_trigger_cpumask_backtrace':
/kisskb/src/arch/powerpc/kernel/stacktrace.c:226:2: error: implicit declaration of function 'nmi_trigger_cpumask_backtrace' [-Werror=implicit-function-declaration]
  nmi_trigger_cpumask_backtrace(mask, exclude_self, raise_backtrace_ipi);
  ^
cc1: all warnings being treated as errors
make[3]: *** [/kisskb/src/scripts/Makefile.build:288: arch/powerpc/kernel/stacktrace.o] Error 1
make[2]: *** [/kisskb/src/scripts/Makefile.build:550: arch/powerpc/kernel] Error 2
make[1]: *** [/kisskb/src/Makefile:1831: arch/powerpc] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 8 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_skiroot_defconfig_powerpc-gcc5
# Build took: 0:00:54.871265