# git rev-parse -q --verify 87066fdd2e30fe9dd531125d95257c118a74617e^{commit}
87066fdd2e30fe9dd531125d95257c118a74617e
already have revision, skipping fetch
# git checkout -q -f -B kisskb 87066fdd2e30fe9dd531125d95257c118a74617e
# git clean -qxdf
# < git log -1
# commit 87066fdd2e30fe9dd531125d95257c118a74617e
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Oct 24 09:48:33 2021 -1000
# 
#     Revert "mm/secretmem: use refcount_t instead of atomic_t"
#     
#     This reverts commit 110860541f443f950c1274f217a1a3e298670a33.
#     
#     Converting the "secretmem_users" counter to a refcount is incorrect,
#     because a refcount is special in zero and can't just be incremented (but
#     a count of users is not, and "no users" is actually perfectly valid and
#     not a sign of a free'd resource).
#     
#     Reported-by: syzbot+75639e6a0331cd61d3e2@syzkaller.appspotmail.com
#     Cc: Jordy Zomer <jordy@pwning.systems>
#     Cc: Kees Cook <keescook@chromium.org>,
#     Cc: Jordy Zomer <jordy@jordyzomer.github.io>
#     Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
#     Cc: Mike Rapoport <rppt@kernel.org>
#     Cc: Andrew Morton <akpm@linux-foundation.org>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux-ld --version
# < git log --format=%s --max-count=1 87066fdd2e30fe9dd531125d95257c118a74617e
# < make -s -j 8 ARCH=m68k O=/kisskb/build/linus_m68k-allmodconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# < make -s -j 8 ARCH=m68k O=/kisskb/build/linus_m68k-allmodconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux-  help
# make -s -j 8 ARCH=m68k O=/kisskb/build/linus_m68k-allmodconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux-  olddefconfig
# make -s -j 8 ARCH=m68k O=/kisskb/build/linus_m68k-allmodconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux-  
/kisskb/src/drivers/spi/spi-tegra20-slink.c:1197:12: error: 'tegra_slink_runtime_resume' defined but not used [-Werror=unused-function]
 static int tegra_slink_runtime_resume(struct device *dev)
            ^~~~~~~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
make[3]: *** [/kisskb/src/scripts/Makefile.build:277: drivers/spi/spi-tegra20-slink.o] Error 1
make[2]: *** [/kisskb/src/scripts/Makefile.build:540: drivers/spi] Error 2
make[2]: *** Waiting for unfinished jobs....
make[1]: *** [/kisskb/src/Makefile:1868: drivers] Error 2
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 8 ARCH=m68k O=/kisskb/build/linus_m68k-allmodconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/m68k-linux/bin/m68k-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_m68k-allmodconfig_m68k-gcc8
# Build took: 0:15:29.302957