linux-kernel - Re: [PATCH 09/22] [v2] arch: fix asm-offsets.c building with -Wmissing-prototypes

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Message-ID: <20231108191050.GA171153@ravnborg.org>
Date:   Wed, 8 Nov 2023 20:10:50 +0100
From:   Sam Ravnborg <sam@...nborg.org>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        linux-kbuild@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
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Subject: Re: [PATCH 09/22] [v2] arch: fix asm-offsets.c building with
 -Wmissing-prototypes

On Wed, Nov 08, 2023 at 01:58:30PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> When -Wmissing-prototypes is enabled, the some asm-offsets.c files fail
> to build, even when this warning is disabled in the Makefile for normal
> files:
> 
> arch/sparc/kernel/asm-offsets.c:22:5: error: no previous prototype for 'sparc32_foo' [-Werror=missing-prototypes]
> arch/sparc/kernel/asm-offsets.c:48:5: error: no previous prototype for 'foo' [-Werror=missing-prototypes]
> 
> Address this by making use of the same trick as x86, marking these
> functions as 'static __used' to avoid the need for a prototype
> by not drop them in dead-code elimination.
> 
> Suggested-by: Masahiro Yamada <masahiroy@...nel.org>
> Link: https://lore.kernel.org/lkml/CAK7LNARfEmFk0Du4Hed19eX_G6tUC5wG0zP+L1AyvdpOF4ybXQ@mail.gmail.com/
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
Looks good. I sometimes looks at sparc patches so I looked at this one.
Reviewed-by: Sam Ravnborg <sam@...nborg.org>