linux-kernel - Re: [PATCH -tip] x86: ftrace.c declare prepare_ftrace

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Date:	Thu, 9 Apr 2009 19:20:55 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Jaswinder Singh Rajput <jaswinder@...nel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>,
	x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -tip] x86: ftrace.c declare prepare_ftrace_return
	before they get used

On Thu, Apr 09, 2009 at 10:07:48PM +0530, Jaswinder Singh Rajput wrote:
> Impact: fix sparse warning:
>   arch/x86/kernel/ftrace.c:411:6: warning: symbol 'prepare_ftrace_return' was not declared. Should it be static?
> 
> Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@...il.com>
> ---
>  arch/x86/include/asm/ftrace.h |    6 ++++++
>  1 files changed, 6 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h
> index bd2c651..49616d4 100644
> --- a/arch/x86/include/asm/ftrace.h
> +++ b/arch/x86/include/asm/ftrace.h
> @@ -62,4 +62,10 @@ struct dyn_arch_ftrace {
>  #endif /* __ASSEMBLY__ */
>  #endif /* CONFIG_FUNCTION_TRACER */
>  
> +#ifdef CONFIG_FUNCTION_GRAPH_TRACER
> +#ifndef __ASSEMBLY__
> +extern void prepare_ftrace_return(unsigned long *, unsigned long);


But it is only used from asm code so there is no need to make
its prototype public.

I don't think this is necessary but if you really think it is, then I would prefer
you use the already existing #ifndef __ASSEMBLY__ block.

Thanks,
Frederic.



> +#endif
> +#endif
> +
>  #endif /* _ASM_X86_FTRACE_H */
> -- 
> 1.6.0.6
> 
> 
> 
> --
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