linux-kernel - Re: [PATCH] ftrace: printk formatting infrastructure fix 2

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Date:	Fri, 08 Aug 2008 12:47:52 +0200
From:	Johannes Weiner <hannes@...urebad.de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ftrace: printk formatting infrastructure fix 2

Hi Andrew,

[sorry, screwed up the recpt list before....]

Johannes Weiner <hannes@...urebad.de> writes:

> Hi,
>
> akpm@...ux-foundation.org writes:
>
>> ftrace-new-continue-entry-separate-out-from-trace_entry.patch
>> ftrace-printk-formatting-infrastructure.patch
>
> ---
> The attribute on the function definition breaks compilation.  Instead of
> removing it, we could use a declaration and add the attribute there, but
> then, when someone adds new ftrace_printk()s, she will probably compile
> with CONFIG_TRACING and the callsite is garuanteed to be verified during
> development.
>
> Signed-off-by: Johannes Weiner <hannes@...urebad.de>
> ---
>  include/linux/ftrace.h |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> --- a/include/linux/ftrace.h
> +++ b/include/linux/ftrace.h
> @@ -165,7 +165,7 @@ __ftrace_printk(unsigned long ip, const 
>  static inline void
>  ftrace_special(unsigned long arg1, unsigned long arg2, unsigned long arg3) { }
>  static inline int
> -ftrace_printk(const char *fmt, ...) __attribute__ ((format (printf, 1, 0)))
> +ftrace_printk(const char *fmt, ...)
>  {
>  	return 0;
>  }

Still needed, get this with mmotm-2008-08-08-00-56 and !CONFIG_TRACING:

In file included from kernel/sched.c:74:
include/linux/ftrace.h:169: error: expected ‘,’ or ‘;’ before ‘{’ token
make[1]: *** [kernel/sched.o] Error 1
make: *** [kernel] Error 2

	Hannes
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