# git gc
# git rev-parse -q --verify e66435936756d9bce96433be183358a8994a0f0d^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify e66435936756d9bce96433be183358a8994a0f0d^{commit}
e66435936756d9bce96433be183358a8994a0f0d
# git checkout -q -f -B kisskb e66435936756d9bce96433be183358a8994a0f0d
# git clean -qxdf
# < git log -1
# commit e66435936756d9bce96433be183358a8994a0f0d
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Mon Nov 1 14:56:37 2021 -0700
# 
#     mm: fix mismerge of folio page flag manipulators
#     
#     I had missed a semantic conflict between commit d389a4a81155 ("mm: Add
#     folio flag manipulation functions") from the folio tree, and commit
#     eac96c3efdb5 ("mm: filemap: check if THP has hwpoisoned subpage for PMD
#     page fault") that added a new set of page flags.
#     
#     My build tests had too many options enabled, which hid this issue.  But
#     if you didn't have MEMORY_FAILURE or TRANSPARENT_HUGEPAGE enabled, you'd
#     end up with build errors like this:
#     
#       include/linux/page-flags.h:806:29: error: macro "PAGEFLAG_FALSE" requires 2 arguments, but only 1 given
#         806 | PAGEFLAG_FALSE(HasHWPoisoned)
#             |                             ^
#     
#     due to the missing lowercase name used for folio function naming.
#     
#     Fixes: 49f8275c7d92 ("Merge tag 'folio-5.16' of git://git.infradead.org/users/willy/pagecache")
#     Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
#     Reported-by: Yang Shi <shy828301@gmail.com>
#     Cc: Matthew Wilcox <willy@infradead.org>
#     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 e66435936756d9bce96433be183358a8994a0f0d
# < make -s -j 10 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  randconfig
# Added to kconfig CONFIG_STANDALONE=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_GCC_PLUGIN_CYC_COMPLEXITY=n
# Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n
# Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n
# Added to kconfig CONFIG_BPF_PRELOAD=n
# Added to kconfig 
# < make -s -j 10 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_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 10 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
.config:6096:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
.config:6098:warning: override: reassigning to symbol GCC_PLUGINS
# make -s -j 10 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld: mm/kfence/kfence_test.o: unable to initialize decompress status for section .debug_info
/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld: mm/kfence/kfence_test.o: unable to initialize decompress status for section .debug_info
mm/built-in.a: member mm/kfence/kfence_test.o in archive is not an object
make[1]: *** [/kisskb/src/Makefile:1184: vmlinux] Error 1
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 10 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus-rand_x86_64-randconfig_x86_64-gcc8
# Build took: 0:17:24.264596