On Wed, Jan 3, 2018 at 3:59 PM, Mark Brown broonie@kernel.org wrote:

On Wed, Jan 03, 2018 at 03:52:12PM +0100, Arnd Bergmann wrote:

...

Greg and Mark, which x86-64 compiler versions do you use?

gcc (Debian 6.3.0-18) 6.3.0 20170516

I installed that version here, same as my other gcc-6 versions, the "-Wno-frame-address" option gets set and interpreted correctly:

$ git checkout v3.18.91 ; touch kernel/sched/core.c ; make V=1 defconfig kernel/sched/core.o CC=gcc-6 2>&1 | tail ... gcc-6 -Wp,-MD,kernel/sched/.core.o.d -nostdinc -isystem /usr/lib/gcc/x86_64-linux-gnu/6/include -I./arch/x86/include -Iarch/x86/include/generated -Iinclude -I./arch/x86/include/uapi -Iarch/x86/include/generated/uapi -I./include/uapi -Iinclude/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -std=gnu89 -m64 -mno-80387 -mno-fp-ret-in-387 -mtune=generic -mno-red-zone -mcmodel=kernel -funit-at-a-time -maccumulate-outgoing-args -DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 -DCONFIG_AS_FXSAVEQ=1 -DCONFIG_AS_CRC32=1 -DCONFIG_AS_AVX=1 -DCONFIG_AS_AVX2=1 -pipe -Wno-sign-compare -fno-asynchronous-unwind-tables -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx -fno-delete-null-pointer-checks -Wno-frame-address -fno-PIE -O2 --param=allow-store-data-races=0 -Wframe-larger-than=2048 -fno-stack-protector -Wno-unused-but-set-variable -Wno-unused-const-variable -fno-omit-frame-pointer -fno-optimize-sibling-calls -fno-var-tracking-assignments -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fno-stack-check -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -Werror=date-time -DCC_HAVE_ASM_GOTO -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(core)" -D"KBUILD_MODNAME=KBUILD_STR(core)" -c -o kernel/sched/core.o kernel/sched/core.c

It might be a problem with different 'make' versions, or something else in the environment that leads to "-Wno-frame-address" not being set on the command line instead.

Arnd