Buildresult: powerpc-next/adder875_defconfig/powerpc-gcc4.6 built on Nov 25 2019, 19:14
kisskb
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Status:
OK
Date/Time:
Nov 25 2019, 19:14
Duration:
0:00:44.760683
Builder:
blade4b
Revision:
powerpc/prom_init: Use -ffreestanding to avoid a reference to bcmp (
324332cb5445aa6470fe57ba6ddcfbc9504958e2)
Target:
powerpc-next/adder875_defconfig/powerpc-gcc4.6
Branch:
powerpc-next
Compiler:
powerpc-gcc4.6
(powerpc-linux-gcc (GCC) 4.6.3 / GNU ld (GNU Binutils) 2.22)
Config:
adder875_defconfig
(
download
)
Log:
Download original
Possible warnings (5)
include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] WARNING: vmlinux.o(.text+0xaab4): Section mismatch in reference from the function mmu_mark_initmem_nx() to the function .init.text:mmu_mapin_ram_chunk() WARNING: vmlinux.o(.text+0xaacc): Section mismatch in reference from the function mmu_mark_initmem_nx() to the function .init.text:mmu_mapin_ram_chunk() WARNING: vmlinux.o(.text+0xaae4): Section mismatch in reference from the function mmu_mark_initmem_nx() to the function .init.text:mmu_mapin_ram_chunk()
Full Log
# 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 <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/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version # < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version # < git log --format=%s --max-count=1 324332cb5445aa6470fe57ba6ddcfbc9504958e2 # < make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_adder875_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- adder875_defconfig # make -s -j 24 ARCH=powerpc O=/kisskb/build/powerpc-next_adder875_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux- /kisskb/src/fs/proc/inode.c: In function 'proc_reg_open': /kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/fs/proc/inode.c:338:21: note: 'pdeo' was declared here /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:204:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] WARNING: vmlinux.o(.text+0xaab4): Section mismatch in reference from the function mmu_mark_initmem_nx() to the function .init.text:mmu_mapin_ram_chunk() The function mmu_mark_initmem_nx() references the function __init mmu_mapin_ram_chunk(). This is often because mmu_mark_initmem_nx lacks a __init annotation or the annotation of mmu_mapin_ram_chunk is wrong. WARNING: vmlinux.o(.text+0xaacc): Section mismatch in reference from the function mmu_mark_initmem_nx() to the function .init.text:mmu_mapin_ram_chunk() The function mmu_mark_initmem_nx() references the function __init mmu_mapin_ram_chunk(). This is often because mmu_mark_initmem_nx lacks a __init annotation or the annotation of mmu_mapin_ram_chunk is wrong. WARNING: vmlinux.o(.text+0xaae4): Section mismatch in reference from the function mmu_mark_initmem_nx() to the function .init.text:mmu_mapin_ram_chunk() The function mmu_mark_initmem_nx() references the function __init mmu_mapin_ram_chunk(). This is often because mmu_mark_initmem_nx lacks a __init annotation or the annotation of mmu_mapin_ram_chunk is wrong. Image Name: Linux-5.4.0-rc2-g324332cb5445 Created: Mon Nov 25 19:14:45 2019 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 1955652 Bytes = 1909.82 KiB = 1.87 MiB Load Address: 00400000 Entry Point: 004001dc Completed OK # rm -rf /kisskb/build/powerpc-next_adder875_defconfig_powerpc-gcc4.6 # Build took: 0:00:44.760683
© Michael Ellerman 2006-2018.