linux-kernel - Re: [PATCH] make CALLER

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Message-Id: <20090228153853.6FC0.A69D9226@jp.fujitsu.com>
Date:	Sat, 28 Feb 2009 15:40:44 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Uwe Kleine-Konig <u.kleine-koenig@...gutronix.de>
Cc:	kosaki.motohiro@...fujitsu.com, linux-kernel@...r.kernel.org,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] make CALLER_ADDRx overwriteable

> The current definition of CALLER_ADDRx isn't suitable for all platforms.
> E.g. for ARM __builtin_return_address(N) doesn't work for N > 0 and
> AFAIK for powerpc there are no frame pointers needed to have a working
> __builtin_return_address.  This patch allows defining the CALLER_ADDRx
> macros in <asm/ftrace.h> and let these take precedence.
> 
> Because now <asm/ftrace.h> is included unconditionally in
> <linux/ftrace.h> all archs that don't already had this include get an
> empty one for free.
> 
> Signed-off-by: Uwe Kleine-Konig <u.kleine-koenig@...gutronix.de>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Ingo Molnar <mingo@...e.hu>
> --
> Hello,
> 
> OK, changed to check for HAVE_ARCH_CALLER_ADDR instead of CALLER_ADDR0.
> 
> Best regards
> Uwe

thanks.

	Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>




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