linux-kernel - Re: [PATCH v3 13/15] sh: Move defines needed for suppressing warning backtraces

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Date: Fri, 5 Apr 2024 19:31:02 +0100
From: Simon Horman <horms@...nel.org>
To: Guenter Roeck <linux@...ck-us.net>
Cc: linux-kselftest@...r.kernel.org, David Airlie <airlied@...il.com>,
	Arnd Bergmann <arnd@...db.de>,
	Maíra Canal <mcanal@...lia.com>,
	Dan Carpenter <dan.carpenter@...aro.org>,
	Kees Cook <keescook@...omium.org>,
	Daniel Diaz <daniel.diaz@...aro.org>,
	David Gow <davidgow@...gle.com>,
	Arthur Grillo <arthurgrillo@...eup.net>,
	Brendan Higgins <brendan.higgins@...ux.dev>,
	Naresh Kamboju <naresh.kamboju@...aro.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Maxime Ripard <mripard@...nel.org>,
	Ville Syrjälä <ville.syrjala@...ux.intel.com>,
	Daniel Vetter <daniel@...ll.ch>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	dri-devel@...ts.freedesktop.org, kunit-dev@...glegroups.com,
	linux-arch@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-parisc@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
	linux-sh@...r.kernel.org, loongarch@...ts.linux.dev,
	netdev@...r.kernel.org, x86@...nel.org,
	Yoshinori Sato <ysato@...rs.sourceforge.jp>,
	Rich Felker <dalias@...c.org>,
	John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
Subject: Re: [PATCH v3 13/15] sh: Move defines needed for suppressing warning
 backtraces

On Wed, Apr 03, 2024 at 06:19:34AM -0700, Guenter Roeck wrote:
> Declaring the defines needed for suppressing warning inside
> '#ifdef CONFIG_DEBUG_BUGVERBOSE' results in a kerneldoc warning.
> 
> .../bug.h:29: warning: expecting prototype for _EMIT_BUG_ENTRY().
> 	Prototype was for HAVE_BUG_FUNCTION() instead
> 
> Move the defines above the kerneldoc entry for _EMIT_BUG_ENTRY
> to make kerneldoc happy.
> 
> Reported-by: Simon Horman <horms@...nel.org>
> Cc: Simon Horman <horms@...nel.org>
> Cc: Yoshinori Sato <ysato@...rs.sourceforge.jp>
> Cc: Rich Felker <dalias@...c.org>
> Cc: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>
> Signed-off-by: Guenter Roeck <linux@...ck-us.net>
> ---
> v3: Added patch. Possibly squash into previous patch.

FWIIW, this looks good to me.

>  arch/sh/include/asm/bug.h | 16 +++++++++-------
>  1 file changed, 9 insertions(+), 7 deletions(-)
> 
> diff --git a/arch/sh/include/asm/bug.h b/arch/sh/include/asm/bug.h
> index 470ce6567d20..bf4947d51d69 100644
> --- a/arch/sh/include/asm/bug.h
> +++ b/arch/sh/include/asm/bug.h
> @@ -11,6 +11,15 @@
>  #define HAVE_ARCH_BUG
>  #define HAVE_ARCH_WARN_ON
>  
> +#ifdef CONFIG_DEBUG_BUGVERBOSE
> +#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE
> +# define HAVE_BUG_FUNCTION
> +# define __BUG_FUNC_PTR	"\t.long %O2\n"
> +#else
> +# define __BUG_FUNC_PTR
> +#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */
> +#endif /* CONFIG_DEBUG_BUGVERBOSE */
> +
>  /**
>   * _EMIT_BUG_ENTRY
>   * %1 - __FILE__
> @@ -25,13 +34,6 @@
>   */
>  #ifdef CONFIG_DEBUG_BUGVERBOSE
>  
> -#ifdef CONFIG_KUNIT_SUPPRESS_BACKTRACE
> -# define HAVE_BUG_FUNCTION
> -# define __BUG_FUNC_PTR	"\t.long %O2\n"
> -#else
> -# define __BUG_FUNC_PTR
> -#endif /* CONFIG_KUNIT_SUPPRESS_BACKTRACE */
> -
>  #define _EMIT_BUG_ENTRY				\
>  	"\t.pushsection __bug_table,\"aw\"\n"	\
>  	"2:\t.long 1b, %O1\n"			\
> -- 
> 2.39.2
>