# git rev-parse -q --verify 39190ac7cff1fd15135fa8e658030d9646fdb5f2^{commit} 39190ac7cff1fd15135fa8e658030d9646fdb5f2 already have revision, skipping fetch # git checkout -q -f -B kisskb 39190ac7cff1fd15135fa8e658030d9646fdb5f2 # git clean -qxdf # < git log -1 # commit 39190ac7cff1fd15135fa8e658030d9646fdb5f2 # Author: Michael Ellerman # Date: Mon Sep 16 22:05:10 2024 +1000 # # powerpc/atomic: Use YZ constraints for DS-form instructions # # The 'ld' and 'std' instructions require a 4-byte aligned displacement # because they are DS-form instructions. But the "m" asm constraint # doesn't enforce that. # # That can lead to build errors if the compiler chooses a non-aligned # displacement, as seen with GCC 14: # # /tmp/ccuSzwiR.s: Assembler messages: # /tmp/ccuSzwiR.s:2579: Error: operand out of domain (39 is not a multiple of 4) # make[5]: *** [scripts/Makefile.build:229: net/core/page_pool.o] Error 1 # # Dumping the generated assembler shows: # # ld 8,39(8) # MEM[(const struct atomic64_t *)_29].counter, t # # Use the YZ constraints to tell the compiler either to generate a DS-form # displacement, or use an X-form instruction, either of which prevents the # build error. # # See commit 2d43cc701b96 ("powerpc/uaccess: Fix build errors seen with # GCC 13/14") for more details on the constraint letters. # # Fixes: 9f0cbea0d8cc ("[POWERPC] Implement atomic{, 64}_{read, write}() without volatile") # Cc: stable@vger.kernel.org # v2.6.24+ # Reported-by: Stephen Rothwell # Closes: https://lore.kernel.org/all/20240913125302.0a06b4c7@canb.auug.org.au # Tested-by: Mina Almasry # Reviewed-by: Segher Boessenkool # Signed-off-by: Michael Ellerman # Link: https://msgid.link/20240916120510.2017749-1-mpe@ellerman.id.au # < /opt/cross/kisskb/korg/gcc-8.5.0-nolibc/m68k-linux/bin/m68k-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.5.0-nolibc/m68k-linux/bin/m68k-linux-ld --version # < git log --format=%s --max-count=1 39190ac7cff1fd15135fa8e658030d9646fdb5f2 # make -s -j 40 ARCH=m68k O=/kisskb/build/powerpc-next_defconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/m68k-linux/bin/m68k-linux- defconfig # < make -s -j 40 ARCH=m68k O=/kisskb/build/powerpc-next_defconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/m68k-linux/bin/m68k-linux- help # make -s -j 40 ARCH=m68k O=/kisskb/build/powerpc-next_defconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/m68k-linux/bin/m68k-linux- olddefconfig # make -s -j 40 ARCH=m68k O=/kisskb/build/powerpc-next_defconfig_m68k-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/m68k-linux/bin/m68k-linux- Completed OK # rm -rf /kisskb/build/powerpc-next_defconfig_m68k-gcc8 # Build took: 0:01:07.319721