Re: [PATCH 2/7] s390: replace cc-option-yn uses with cc-option

[Nathan Chancellor <nathan@kernel.org>]

On 8/16/2021 5:21 PM, 'Nick Desaulniers' via Clang Built Linux wrote:
> cc-option-yn can be replaced with cc-option. ie.
> Checking for support:
> ifeq ($(call cc-option-yn,$(FLAG)),y)
> becomes:
> ifneq ($(call cc-option,$(FLAG)),)
> 
> Checking for lack of support:
> ifeq ($(call cc-option-yn,$(FLAG)),n)
> becomes:
> ifeq ($(call cc-option,$(FLAG)),)
> 
> This allows us to pursue removing cc-option-yn.
> 
> Cc: Heiko Carstens <hca@linux.ibm.com>
> Cc: Vasily Gorbik <gor@linux.ibm.com>
> Cc: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: linux-s390@vger.kernel.org
> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>

Reviewed-by: Nathan Chancellor <nathan@kernel.org>

> ---
>   arch/s390/Makefile | 14 +++++++-------
>   1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/s390/Makefile b/arch/s390/Makefile
> index 17dc4f1ac4fa..a3cf33ad009f 100644
> --- a/arch/s390/Makefile
> +++ b/arch/s390/Makefile
> @@ -70,7 +70,7 @@ cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
>   #
>   cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
>   
> -ifeq ($(call cc-option-yn,-mpacked-stack -mbackchain -msoft-float),y)
> +ifneq ($(call cc-option,-mpacked-stack -mbackchain -msoft-float),)
>   cflags-$(CONFIG_PACK_STACK)  += -mpacked-stack -D__PACK_STACK
>   aflags-$(CONFIG_PACK_STACK)  += -D__PACK_STACK
>   endif
> @@ -78,22 +78,22 @@ endif
>   KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
>   KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
>   
> -ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
> +ifneq ($(call cc-option,-mstack-size=8192 -mstack-guard=128),)
>   cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
> -ifneq ($(call cc-option-yn,-mstack-size=8192),y)
> +ifeq ($(call cc-option,-mstack-size=8192),)
>   cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
>   endif
>   endif
>   
>   ifdef CONFIG_WARN_DYNAMIC_STACK
> -  ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
> +  ifneq ($(call cc-option,-mwarn-dynamicstack),)
>       KBUILD_CFLAGS += -mwarn-dynamicstack
>       KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
>     endif
>   endif
>   
>   ifdef CONFIG_EXPOLINE
> -  ifeq ($(call cc-option-yn,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),y)
> +  ifneq ($(call cc-option,$(CC_FLAGS_MARCH) -mindirect-branch=thunk),)
>       CC_FLAGS_EXPOLINE := -mindirect-branch=thunk
>       CC_FLAGS_EXPOLINE += -mfunction-return=thunk
>       CC_FLAGS_EXPOLINE += -mindirect-branch-table
> @@ -104,10 +104,10 @@ ifdef CONFIG_EXPOLINE
>   endif
>   
>   ifdef CONFIG_FUNCTION_TRACER
> -  ifeq ($(call cc-option-yn,-mfentry -mnop-mcount),n)
> +  ifeq ($(call cc-option,-mfentry -mnop-mcount),)
>       # make use of hotpatch feature if the compiler supports it
>       cc_hotpatch	:= -mhotpatch=0,3
> -    ifeq ($(call cc-option-yn,$(cc_hotpatch)),y)
> +    ifneq ($(call cc-option,$(cc_hotpatch)),)
>         CC_FLAGS_FTRACE := $(cc_hotpatch)
>         KBUILD_AFLAGS	+= -DCC_USING_HOTPATCH
>         KBUILD_CFLAGS	+= -DCC_USING_HOTPATCH
>