Buildresult: powerpc-next/44x/rainier_defconfig/powerpc-gcc5 built on Nov 26 2019, 00:44

kisskb

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Status:	OK
Date/Time:	Nov 26 2019, 00:44
Duration:	0:00:22.678515
Builder:	ka4
Revision:	powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp (`8dcd71b45df34d9b903450fab147ee8c1e6c16b5)`
Target:	powerpc-next/44x/rainier_defconfig/powerpc-gcc5
Branch:	powerpc-next
Compiler:	powerpc-gcc5 (powerpc64-linux-gcc (GCC) 5.5.0 / GNU ld (GNU Binutils) 2.29.1.20170915)
Config:	44x/rainier_defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify 8dcd71b45df34d9b903450fab147ee8c1e6c16b5^{commit} 8dcd71b45df34d9b903450fab147ee8c1e6c16b5 already have revision, skipping fetch # git checkout -q -f -B kisskb 8dcd71b45df34d9b903450fab147ee8c1e6c16b5 # git clean -qxdf # < git log -1 # commit 8dcd71b45df34d9b903450fab147ee8c1e6c16b5 # Author: Nathan Chancellor <natechancellor@gmail.com> # 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 <ndesaulniers@google.com> # Signed-off-by: Nathan Chancellor <natechancellor@gmail.com> # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20191119045712.39633-4-natechancellor@gmail.com # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version # < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version # < git log --format=%s --max-count=1 8dcd71b45df34d9b903450fab147ee8c1e6c16b5 # < make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_rainier_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- 44x/rainier_defconfig # make -s -j 120 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_rainier_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux- INFO: Uncompressed kernel (size 0x4a1928) overlaps the address of the wrapper(0x400000) INFO: Fixing the link_address of wrapper to (0x500000) Image Name: Linux-5.4.0-rc2-g8dcd71b45df3 Created: Tue Nov 26 00:44:35 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 2374928 Bytes = 2319.27 KiB = 2.26 MiB Load Address: 00500000 Entry Point: 00501534 Completed OK # rm -rf /kisskb/build/powerpc-next_44x_rainier_defconfig_powerpc-gcc5 # Build took: 0:00:22.678515

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