# 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-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-ld --version
# < git log --format=%s --max-count=1 021533194476035883300d60fbb3136426ac8ea5
# make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_HAVE_FTRACE_MCOUNT_RECORD=n
# Added to kconfig CONFIG_SAMPLES=n
# Added to kconfig CONFIG_MODULE_SIG=n
# < make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  help
# make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  olddefconfig
# make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  
<stdin>:1519:2: warning: #warning syscall clone3 not implemented [-Wcpp]
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
/kisskb/src/arch/sparc/vdso/vma.c:246:12: error: no previous prototype for 'init_vdso_image' [-Werror=missing-prototypes]
 int __init init_vdso_image(const struct vdso_image *image,
            ^
/kisskb/src/arch/sparc/power/hibernate.c:22:5: error: no previous prototype for 'pfn_is_nosave' [-Werror=missing-prototypes]
 int pfn_is_nosave(unsigned long pfn)
     ^
/kisskb/src/arch/sparc/power/hibernate.c:30:6: error: no previous prototype for 'save_processor_state' [-Werror=missing-prototypes]
 void save_processor_state(void)
      ^
/kisskb/src/arch/sparc/power/hibernate.c:35:6: error: no previous prototype for 'restore_processor_state' [-Werror=missing-prototypes]
 void restore_processor_state(void)
      ^
cc1: error: unrecognized command line option '-Wno-shift-negative-value' [-Werror]
cc1: error: unrecognized command line option '-Wno-stringop-overflow' [-Werror]
cc1: all warnings being treated as errors
cc1: error: unrecognized command line option '-Wno-shift-negative-value' [-Werror]
cc1: error: unrecognized command line option '-Wno-stringop-overflow' [-Werror]
cc1: all warnings being treated as errors
make[4]: *** [/kisskb/src/scripts/Makefile.build:243: arch/sparc/power/hibernate.o] Error 1
make[3]: *** [/kisskb/src/scripts/Makefile.build:481: arch/sparc/power] Error 2
make[3]: *** Waiting for unfinished jobs....
make[5]: *** [/kisskb/src/scripts/Makefile.build:243: arch/sparc/vdso/vma.o] Error 1
make[4]: *** [/kisskb/src/scripts/Makefile.build:481: arch/sparc/vdso] Error 2
make[4]: *** Waiting for unfinished jobs....
/kisskb/src/arch/sparc/kernel/traps_64.c:253:6: error: no previous prototype for 'is_no_fault_exception' [-Werror=missing-prototypes]
 bool is_no_fault_exception(struct pt_regs *regs)
      ^
/kisskb/src/arch/sparc/kernel/traps_64.c:2035:6: error: no previous prototype for 'do_mcd_err' [-Werror=missing-prototypes]
 void do_mcd_err(struct pt_regs *regs, struct sun4v_error_entry ent)
      ^
/kisskb/src/arch/sparc/kernel/traps_64.c:2153:6: error: no previous prototype for 'sun4v_nonresum_error_user_handled' [-Werror=missing-prototypes]
 bool sun4v_nonresum_error_user_handled(struct pt_regs *regs,
      ^
cc1: error: unrecognized command line option '-Wno-shift-negative-value' [-Werror]
cc1: error: unrecognized command line option '-Wno-stringop-overflow' [-Werror]
cc1: all warnings being treated as errors
make[5]: *** [/kisskb/src/scripts/Makefile.build:243: arch/sparc/kernel/traps_64.o] Error 1
make[4]: *** [/kisskb/src/scripts/Makefile.build:481: arch/sparc/kernel] Error 2
/kisskb/src/arch/sparc/prom/misc_64.c:165:5: error: no previous prototype for 'prom_get_mmu_ihandle' [-Werror=missing-prototypes]
 int prom_get_mmu_ihandle(void)
     ^
cc1: error: unrecognized command line option '-Wno-shift-negative-value' [-Werror]
cc1: error: unrecognized command line option '-Wno-stringop-overflow' [-Werror]
cc1: all warnings being treated as errors
make[4]: *** [/kisskb/src/scripts/Makefile.build:243: arch/sparc/prom/misc_64.o] Error 1
make[3]: *** [/kisskb/src/scripts/Makefile.build:481: arch/sparc/prom] Error 2
/kisskb/src/arch/sparc/mm/init_64.c:2644:6: error: no previous prototype for 'vmemmap_free' [-Werror=missing-prototypes]
 void vmemmap_free(unsigned long start, unsigned long end,
      ^
cc1: error: unrecognized command line option '-Wno-shift-negative-value' [-Werror]
cc1: error: unrecognized command line option '-Wno-stringop-overflow' [-Werror]
cc1: all warnings being treated as errors
make[5]: *** [/kisskb/src/scripts/Makefile.build:243: arch/sparc/mm/init_64.o] Error 1
make[4]: *** [/kisskb/src/scripts/Makefile.build:481: arch/sparc/mm] Error 2
make[3]: *** [/kisskb/src/scripts/Makefile.build:481: arch/sparc] Error 2
In file included from /kisskb/src/arch/sparc/include/asm/floppy.h:5:0,
                 from /kisskb/src/drivers/block/floppy.c:250:
/kisskb/src/arch/sparc/include/asm/floppy_64.h:200:13: error: no previous prototype for 'sparc_floppy_irq' [-Werror=missing-prototypes]
 irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie)
             ^
In file included from /kisskb/src/arch/sparc/include/asm/floppy.h:5:0,
                 from /kisskb/src/drivers/block/floppy.c:250:
/kisskb/src/arch/sparc/include/asm/floppy_64.h:437:6: error: no previous prototype for 'sun_pci_fd_dma_callback' [-Werror=missing-prototypes]
 void sun_pci_fd_dma_callback(struct ebus_dma_info *p, int event, void *cookie)
      ^
cc1: error: unrecognized command line option '-Wno-shift-negative-value' [-Werror]
cc1: error: unrecognized command line option '-Wno-stringop-overflow' [-Werror]
cc1: all warnings being treated as errors
make[5]: *** [/kisskb/src/scripts/Makefile.build:243: drivers/block/floppy.o] Error 1
make[4]: *** [/kisskb/src/scripts/Makefile.build:481: drivers/block] Error 2
make[4]: *** Waiting for unfinished jobs....
/kisskb/src/drivers/gpu/drm/xe/xe_lrc.c:24:0: error: "CTX_VALID" redefined [-Werror]
 #define CTX_VALID    (1 << 0)
 ^
In file included from /kisskb/src/arch/sparc/include/asm/mmu.h:5:0,
                 from /kisskb/src/include/linux/mm_types.h:23,
                 from /kisskb/src/arch/sparc/include/asm/uaccess_64.h:11,
                 from /kisskb/src/arch/sparc/include/asm/uaccess.h:8,
                 from /kisskb/src/include/linux/uaccess.h:11,
                 from /kisskb/src/include/linux/sched/task.h:13,
                 from /kisskb/src/include/linux/sched/signal.h:9,
                 from /kisskb/src/include/linux/rcuwait.h:6,
                 from /kisskb/src/include/linux/irq_work.h:6,
                 from /kisskb/src/drivers/gpu/drm/xe/xe_hw_fence_types.h:11,
                 from /kisskb/src/drivers/gpu/drm/xe/xe_lrc_types.h:9,
                 from /kisskb/src/drivers/gpu/drm/xe/xe_lrc.h:8,
                 from /kisskb/src/drivers/gpu/drm/xe/xe_lrc.c:6:
/kisskb/src/arch/sparc/include/asm/mmu_64.h:57:0: note: this is the location of the previous definition
 #define CTX_VALID(__ctx) \
 ^
cc1: error: unrecognized command line option '-Wno-shift-negative-value' [-Werror]
cc1: error: unrecognized command line option '-Wno-shift-negative-value' [-Werror]
cc1: error: unrecognized command line option '-Wno-stringop-overflow' [-Werror]
cc1: all warnings being treated as errors
make[7]: *** [/kisskb/src/scripts/Makefile.build:243: drivers/gpu/drm/xe/xe_lrc.o] Error 1
make[6]: *** [/kisskb/src/scripts/Makefile.build:481: drivers/gpu/drm/xe] Error 2
make[6]: *** Waiting for unfinished jobs....
make[5]: *** [/kisskb/src/scripts/Makefile.build:481: drivers/gpu/drm] Error 2
make[4]: *** [/kisskb/src/scripts/Makefile.build:481: drivers/gpu] Error 2
make[3]: *** [/kisskb/src/scripts/Makefile.build:481: drivers] Error 2
make[2]: *** [/kisskb/src/Makefile:1921: .] Error 2
make[1]: *** [/kisskb/src/Makefile:240: __sub-make] Error 2
make: *** [Makefile:240: __sub-make] Error 2
Command 'make -s -j 40 ARCH=sparc64 O=/kisskb/build/linus_allmodconfig_sparc64-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/sparc64-linux/bin/sparc64-linux-  ' returned non-zero exit status 2.
# rm -rf /kisskb/build/linus_allmodconfig_sparc64-gcc5
# Build took: 0:03:41.479520