# git rev-parse -q --verify 5c4e0a21fae877a7ef89be6dcc6263ec672372b8^{commit}
5c4e0a21fae877a7ef89be6dcc6263ec672372b8
already have revision, skipping fetch
# git checkout -q -f -B kisskb 5c4e0a21fae877a7ef89be6dcc6263ec672372b8
# git clean -qxdf
# < git log -1
# commit 5c4e0a21fae877a7ef89be6dcc6263ec672372b8
# Author: Guenter Roeck <linux@roeck-us.net>
# Date:   Tue Nov 2 07:24:20 2021 -0700
# 
#     string: uninline memcpy_and_pad
#     
#     When building m68k:allmodconfig, recent versions of gcc generate the
#     following error if the length of UTS_RELEASE is less than 8 bytes.
#     
#       In function 'memcpy_and_pad',
#         inlined from 'nvmet_execute_disc_identify' at
#           drivers/nvme/target/discovery.c:268:2: arch/m68k/include/asm/string.h:72:25: error:
#             '__builtin_memcpy' reading 8 bytes from a region of size 7
#     
#     Discussions around the problem suggest that this only happens if an
#     architecture does not provide strlen(), if -ffreestanding is provided as
#     compiler option, and if CONFIG_FORTIFY_SOURCE=n. All of this is the case
#     for m68k. The exact reasons are unknown, but seem to be related to the
#     ability of the compiler to evaluate the return value of strlen() and
#     the resulting execution flow in memcpy_and_pad(). It would be possible
#     to work around the problem by using sizeof(UTS_RELEASE) instead of
#     strlen(UTS_RELEASE), but that would only postpone the problem until the
#     function is called in a similar way. Uninline memcpy_and_pad() instead
#     to solve the problem for good.
#     
#     Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
#     Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
#     Acked-by: Andy Shevchenko <andriy.shevchenko@intel.com>
#     Signed-off-by: Guenter Roeck <linux@roeck-us.net>
#     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 5c4e0a21fae877a7ef89be6dcc6263ec672372b8
# < make -s -j 32 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# < make -s -j 32 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_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 32 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 32 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
Completed OK
# rm -rf /kisskb/build/linus_x86_64_defconfig_x86_64-gcc8
# Build took: 0:01:34.161396