linux-kernel - Re: [PATCH v8 2/5] arm64: replace -pg with CC_FLAGS

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Message-ID: <20190211115953.GD10501@lakrids.cambridge.arm.com>
Date:   Mon, 11 Feb 2019 11:59:54 +0000
From:   Mark Rutland <mark.rutland@....com>
To:     Torsten Duwe <duwe@....de>
Cc:     Will Deacon <will.deacon@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Julien Thierry <julien.thierry@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Ingo Molnar <mingo@...hat.com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>,
        Amit Daniel Kachhap <amit.kachhap@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        live-patching@...r.kernel.org, linux-efi@...r.kernel.org
Subject: Re: [PATCH v8 2/5] arm64: replace -pg with CC_FLAGS_FTRACE in efi
 Makefiles

On Fri, Feb 08, 2019 at 04:10:11PM +0100, Torsten Duwe wrote:
>   In preparation for arm64 supporting ftrace built on other compiler
>   options, let's have makefiles remove the $(CC_FLAGS_FTRACE)
>   flags, whatever these may be, rather than assuming '-pg'.
>   While at it, fix arm32 as well.
> 
>   There should be no functional change as a result of this patch.
> 
> Signed-off-by: Torsten Duwe <duwe@...e.de>

With the indentation removed from the commit text:

Reviewed-by: Mark Rutland <mark.rutland@....com>

Mark.

> 
> ---
>  drivers/firmware/efi/libstub/Makefile |    6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> --- a/drivers/firmware/efi/libstub/Makefile
> +++ b/drivers/firmware/efi/libstub/Makefile
> @@ -16,9 +16,9 @@ cflags-$(CONFIG_X86)		+= -m$(BITS) -D__K
>  
>  # arm64 uses the full KBUILD_CFLAGS so it's necessary to explicitly
>  # disable the stackleak plugin
> -cflags-$(CONFIG_ARM64)		:= $(subst -pg,,$(KBUILD_CFLAGS)) -fpie \
> -				   $(DISABLE_STACKLEAK_PLUGIN)
> -cflags-$(CONFIG_ARM)		:= $(subst -pg,,$(KBUILD_CFLAGS)) \
> +cflags-$(CONFIG_ARM64)		:= $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
> +				   -fpie $(DISABLE_STACKLEAK_PLUGIN)
> +cflags-$(CONFIG_ARM)		:= $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
>  				   -fno-builtin -fpic \
>  				   $(call cc-option,-mno-single-pic-base)
>