# git rev-parse -q --verify f8ad8187c3b536ee2b10502a8340c014204a1af0^{commit}
f8ad8187c3b536ee2b10502a8340c014204a1af0
already have revision, skipping fetch
# git checkout -q -f -B kisskb f8ad8187c3b536ee2b10502a8340c014204a1af0
# git clean -qxdf
# < git log -1
# commit f8ad8187c3b536ee2b10502a8340c014204a1af0
# Author: Johannes Berg <johannes@sipsolutions.net>
# Date:   Mon Jan 25 10:16:15 2021 +0100
# 
#     fs/pipe: allow sendfile() to pipe again
#     
#     After commit 36e2c7421f02 ("fs: don't allow splice read/write
#     without explicit ops") sendfile() could no longer send data
#     from a real file to a pipe, breaking for example certain cgit
#     setups (e.g. when running behind fcgiwrap), because in this
#     case cgit will try to do exactly this: sendfile() to a pipe.
#     
#     Fix this by using iter_file_splice_write for the splice_write
#     method of pipes, as suggested by Christoph.
#     
#     Cc: stable@vger.kernel.org
#     Fixes: 36e2c7421f02 ("fs: don't allow splice read/write without explicit ops")
#     Suggested-by: Christoph Hellwig <hch@lst.de>
#     Reviewed-by: Christoph Hellwig <hch@lst.de>
#     Tested-by: Johannes Berg <johannes@sipsolutions.net>
#     Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 f8ad8187c3b536ee2b10502a8340c014204a1af0
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  randconfig
KCONFIG_SEED=0xB811A972
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_CPU_BIG_ENDIAN=y
# Added to kconfig CONFIG_PPC64=y
# Added to kconfig CONFIG_PPC_DISABLE_WERROR=y
# Added to kconfig CONFIG_SECTION_MISMATCH_WARN_ONLY=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_LD_HEAD_STUB_CATCH=y
# Added to kconfig CONFIG_TRIM_UNUSED_KSYMS=n
# Added to kconfig CONFIG_UBSAN=n
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 8 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
.config:3762:warning: override: reassigning to symbol STANDALONE
.config:3764:warning: override: reassigning to symbol MODULE_SIG
.config:3766:warning: override: reassigning to symbol PPC64
.config:3767:warning: override: reassigning to symbol PPC_DISABLE_WERROR
.config:3768:warning: override: reassigning to symbol SECTION_MISMATCH_WARN_ONLY
.config:3769:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
# make -s -j 8 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/arch/powerpc/kernel/eeh.c:1571:12: warning: 'proc_eeh_show' defined but not used [-Wunused-function]
 static int proc_eeh_show(struct seq_file *m, void *v)
            ^
In file included from <command-line>:0:0:
/kisskb/src/mm/mremap.c: In function 'get_extent':
/kisskb/src/include/linux/compiler_types.h:320:38: error: call to '__compiletime_assert_305' declared with attribute error: BUILD_BUG failed
  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
                                      ^
/kisskb/src/include/linux/compiler_types.h:301:4: note: in definition of macro '__compiletime_assert'
    prefix ## suffix();    \
    ^
/kisskb/src/include/linux/compiler_types.h:320:2: note: in expansion of macro '_compiletime_assert'
  _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
  ^
/kisskb/src/include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert'
 #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                     ^
/kisskb/src/include/linux/build_bug.h:59:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'
 #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
                     ^
/kisskb/src/mm/mremap.c:355:3: note: in expansion of macro 'BUILD_BUG'
   BUILD_BUG();
   ^
make[2]: *** [/kisskb/src/scripts/Makefile.build:279: mm/mremap.o] Error 1
make[1]: *** [/kisskb/src/Makefile:1805: mm] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:185: __sub-make] Error 2
Command 'make -s -j 8 ARCH=powerpc O=/kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus-rand_powerpc-randconfig_powerpc-gcc4.9
# Build took: 0:01:25.307964