# git rev-parse -q --verify 021533194476035883300d60fbb3136426ac8ea5^{commit}
021533194476035883300d60fbb3136426ac8ea5
already have revision, skipping fetch
# git checkout -q -f -B kisskb 021533194476035883300d60fbb3136426ac8ea5
# git clean -qxdf
# < git log -1
# commit 021533194476035883300d60fbb3136426ac8ea5
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu Feb 1 14:57:17 2024 -0800
# 
#     Kconfig: Disable -Wstringop-overflow for GCC globally
#     
#     It turns out it was never just gcc-11 that was broken.  Apparently it
#     just happens to work on x86-64 with other gcc versions.
#     
#     On arm64, I see warnings with gcc version 13.2.1, and the kernel test
#     robot reports the same problem on s390 with gcc 13.2.0.
#     
#     Admittedly it seems to be just the new Xe drm driver, but this is
#     keeping me from doing my normal arm64 build testing.  So it gets
#     reverted until somebody figures out what causes the problem (and why it
#     doesn't show on x86-64, which is what makes me suspect it was never just
#     about gcc-11, and more about just random happenstance).
#     
#     This also changes the Kconfig naming a bit - just make the "disable this
#     for GCC" conditional be one simple Kconfig entry, and we can put the gcc
#     version dependencies in that entry once we figure out what the correct
#     rules are.
#     
#     The version dependency _may_ still end up being "gcc version larger than
#     11" if the issue is purely in the Xe driver, but even if that ends up
#     the case, let's make that all part of the "GCC_NO_STRINGOP_OVERFLOW"
#     logic.
#     
#     For now, we just disable it for all gcc versions while the exact cause
#     is unknown.
#     
#     Link: https://lore.kernel.org/all/202401161031.hjGJHMiJ-lkp@intel.com/T/
#     Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
#     Cc: Kees Cook <keescook@chromium.org>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sh4-linux/bin/sh4-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sh4-linux/bin/sh4-linux-ld --version
# < git log --format=%s --max-count=1 021533194476035883300d60fbb3136426ac8ea5
# make -s -j 40 ARCH=sh O=/kisskb/build/linus_se7619_defconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sh4-linux/bin/sh4-linux-  se7619_defconfig
# < make -s -j 40 ARCH=sh O=/kisskb/build/linus_se7619_defconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sh4-linux/bin/sh4-linux-  help
# make -s -j 40 ARCH=sh O=/kisskb/build/linus_se7619_defconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sh4-linux/bin/sh4-linux-  olddefconfig
# make -s -j 40 ARCH=sh O=/kisskb/build/linus_se7619_defconfig_sh4-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.3.0-nolibc/sh4-linux/bin/sh4-linux-  
  Generating include/generated/machtypes.h
<stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp]
/kisskb/src/arch/sh/kernel/cpu/init.c:99:29: warning: no previous prototype for 'l2_cache_init' [-Wmissing-prototypes]
   99 | void __attribute__ ((weak)) l2_cache_init(void)
      |                             ^~~~~~~~~~~~~
/kisskb/src/arch/sh/mm/cache-sh2.c:85:13: warning: no previous prototype for 'sh2_cache_init' [-Wmissing-prototypes]
   85 | void __init sh2_cache_init(void)
      |             ^~~~~~~~~~~~~~
/kisskb/src/arch/sh/mm/nommu.c:76:13: warning: no previous prototype for 'kmap_coherent_init' [-Wmissing-prototypes]
   76 | void __init kmap_coherent_init(void)
      |             ^~~~~~~~~~~~~~~~~~
/kisskb/src/arch/sh/mm/nommu.c:80:7: warning: no previous prototype for 'kmap_coherent' [-Wmissing-prototypes]
   80 | void *kmap_coherent(struct page *page, unsigned long addr)
      |       ^~~~~~~~~~~~~
/kisskb/src/arch/sh/mm/nommu.c:86:6: warning: no previous prototype for 'kunmap_coherent' [-Wmissing-prototypes]
   86 | void kunmap_coherent(void *kvaddr)
      |      ^~~~~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/return_address.c:49:7: warning: no previous prototype for 'return_address' [-Wmissing-prototypes]
   49 | void *return_address(unsigned int depth)
      |       ^~~~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/sys_sh.c:58:16: warning: no previous prototype for 'sys_cacheflush' [-Wmissing-prototypes]
   58 | asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
      |                ^~~~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/traps_32.c:735:6: warning: no previous prototype for 'per_cpu_trap_init' [-Wmissing-prototypes]
  735 | void per_cpu_trap_init(void)
      |      ^~~~~~~~~~~~~~~~~
/kisskb/src/arch/sh/kernel/hw_breakpoint.c:135:5: warning: no previous prototype for 'arch_bp_generic_fields' [-Wmissing-prototypes]
  135 | int arch_bp_generic_fields(int sh_len, int sh_type,
      |     ^~~~~~~~~~~~~~~~~~~~~~
Completed OK
# rm -rf /kisskb/build/linus_se7619_defconfig_sh4-gcc11
# Build took: 0:00:21.537849