# git rev-parse -q --verify 324332cb5445aa6470fe57ba6ddcfbc9504958e2^{commit} 324332cb5445aa6470fe57ba6ddcfbc9504958e2 already have revision, skipping fetch # git checkout -q -f -B kisskb 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # git clean -qxdf # < git log -1 # commit 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # Author: Nathan Chancellor # Date: Mon Nov 18 21:57:12 2019 -0700 # # powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp # # LLVM revision r374662 gives LLVM the ability to convert certain loops # into a reference to bcmp as an optimization; this breaks # prom_init_check.sh: # # CALL arch/powerpc/kernel/prom_init_check.sh # Error: External symbol 'bcmp' referenced from prom_init.c # make[2]: *** [arch/powerpc/kernel/Makefile:196: prom_init_check] Error 1 # # bcmp is defined in lib/string.c as a wrapper for memcmp so this could # be added to the whitelist. However, commit # 450e7dd4001f ("powerpc/prom_init: don't use string functions from # lib/") copied memcmp as prom_memcmp to avoid KASAN instrumentation so # having bcmp be resolved to regular memcmp would break that assumption. # Furthermore, because the compiler is the one that inserted bcmp, we # cannot provide something like prom_bcmp. # # To prevent LLVM from being clever with optimizations like this, use # -ffreestanding to tell LLVM we are not hosted so it is not free to # make transformations like this. # # Reviewed-by: Nick Desaulneris # Signed-off-by: Nathan Chancellor # Signed-off-by: Michael Ellerman # Link: https://lore.kernel.org/r/20191119045712.39633-4-natechancellor@gmail.com # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- ppc6xx_defconfig # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/powerpc64-linux/bin/powerpc64-linux- In file included from /kisskb/src/sound/ppc/pmac.h:12, from /kisskb/src/sound/ppc/awacs.c:16: /kisskb/src/sound/ppc/awacs.c: In function 'snd_pmac_awacs_init': /kisskb/src/include/sound/control.h:208:9: warning: 'speaker_vol' may be used uninitialized in this function [-Wmaybe-uninitialized] return _snd_ctl_add_slave(master, slave, 0); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /kisskb/src/sound/ppc/awacs.c:873:36: note: 'speaker_vol' was declared here struct snd_kcontrol *master_vol, *speaker_vol; ^~~~~~~~~~~ INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb4f968) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb60080) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) INFO: Uncompressed kernel (size 0xb4f968) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0xc00000) Image Name: Linux-5.4.0-rc2+ Created: Mon Nov 25 20:53:24 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5435451 Bytes = 5308.06 KiB = 5.18 MiB Load Address: 00c00000 Entry Point: 00c002a4 Image Name: Linux-5.4.0-rc2+ Created: Mon Nov 25 20:53:24 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5434420 Bytes = 5307.05 KiB = 5.18 MiB Load Address: 00c00000 Entry Point: 00c002a4 Image Name: Linux-5.4.0-rc2+ Created: Mon Nov 25 20:53:25 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5436695 Bytes = 5309.27 KiB = 5.18 MiB Load Address: 00c00000 Entry Point: 00c00934 Image Name: Linux-5.4.0-rc2+ Created: Mon Nov 25 20:53:25 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5436286 Bytes = 5308.87 KiB = 5.18 MiB Load Address: 00c00000 Entry Point: 00c002a4 Image Name: Linux-5.4.0-rc2+ Created: Mon Nov 25 20:53:25 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5399905 Bytes = 5273.34 KiB = 5.15 MiB Load Address: 00000000 Entry Point: 00000000 Image Name: Linux-5.4.0-rc2+ Created: Mon Nov 25 20:53:25 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5436824 Bytes = 5309.40 KiB = 5.18 MiB Load Address: 00c00000 Entry Point: 00c00934 Image Name: Linux-5.4.0-rc2+ Created: Mon Nov 25 20:53:25 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5434931 Bytes = 5307.55 KiB = 5.18 MiB Load Address: 00c00000 Entry Point: 00c002a4 Image Name: Linux-5.4.0-rc2+ Created: Mon Nov 25 20:53:25 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5435257 Bytes = 5307.87 KiB = 5.18 MiB Load Address: 00c00000 Entry Point: 00c002a4 Image Name: Linux-5.4.0-rc2+ Created: Mon Nov 25 20:53:26 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 5435501 Bytes = 5308.11 KiB = 5.18 MiB Load Address: 00c00000 Entry Point: 00c002a4 Completed OK # rm -rf /kisskb/build/powerpc-next_ppc6xx_defconfig_powerpc-gcc8 # Build took: 0:05:12.178325