linux-kernel - Re: [PATCH v2 5/5] ARM: warn if divided syntax assembler is used

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Date:   Mon, 11 Feb 2019 10:03:05 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Stefan Agner <stefan@...er.ch>
Cc:     Russell King <linux@...linux.org.uk>,
        Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Nicolas Pitre <nicolas.pitre@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Will Deacon <will.deacon@....com>, julien.thierry@....com,
        Mark Rutland <mark.rutland@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 5/5] ARM: warn if divided syntax assembler is used

On Sat, Feb 9, 2019 at 3:09 PM Stefan Agner <stefan@...er.ch> wrote:
>
> Remove the -mno-warn-deprecated assembler flag to make sure the GNU
> assembler warns in case non-unified syntax is used.
>
> Signed-off-by: Stefan Agner <stefan@...er.ch>
> ---
> Changes in v2:
> - Remove AFLAGS_NOWARN from CFLAGS_ISA

Thanks for making this requested change.
Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

>
>  arch/arm/Makefile | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
>
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index a0d08a3c9d33..9561325c5201 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -112,19 +112,16 @@ ifeq ($(CONFIG_ARM_UNWIND),y)
>  CFLAGS_ABI     +=-funwind-tables
>  endif
>
> -# Accept old syntax despite ".syntax unified"
> -AFLAGS_NOWARN  :=$(call as-option,-Wa$(comma)-mno-warn-deprecated,-Wa$(comma)-W)
> -
>  ifeq ($(CONFIG_THUMB2_KERNEL),y)
>  AFLAGS_AUTOIT  :=$(call as-option,-Wa$(comma)-mimplicit-it=always,-Wa$(comma)-mauto-it)
> -CFLAGS_ISA     :=-mthumb $(AFLAGS_AUTOIT) $(AFLAGS_NOWARN)
> +CFLAGS_ISA     :=-mthumb $(AFLAGS_AUTOIT)
>  AFLAGS_ISA     :=$(CFLAGS_ISA) -Wa$(comma)-mthumb
>  # Work around buggy relocation from gas if requested:
>  ifeq ($(CONFIG_THUMB2_AVOID_R_ARM_THM_JUMP11),y)
>  KBUILD_CFLAGS_MODULE   +=-fno-optimize-sibling-calls
>  endif
>  else
> -CFLAGS_ISA     :=$(call cc-option,-marm,) $(AFLAGS_NOWARN)
> +CFLAGS_ISA     :=$(call cc-option,-marm,)
>  AFLAGS_ISA     :=$(CFLAGS_ISA)
>  endif
>
> --
> 2.20.1
>


-- 
Thanks,
~Nick Desaulniers