linux-kernel - Re: [PATCH] ftrace: x86 use copy to and from user functions

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Message-ID: <20080821103117.GB19452@elte.hu>
Date:	Thu, 21 Aug 2008 12:31:17 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [PATCH] ftrace: x86 use copy to and from user functions


* Steven Rostedt <rostedt@...dmis.org> wrote:

> The modification of code is performed either by kstop_machine, before 
> SMP starts, or on module code before the module is executed. There is 
> no reason to do the modifications from assembly. The copy to and from 
> user functions are sufficient and produces cleaner and easier to read 
> code.
> 
> Thanks to Benjamin Herrenschmidt for suggesting the idea.
> 
> Signed-off-by: Steven Rostedt <srostedt@...hat.com>

applied to tip/tracing/ftrace - thanks Steve!

	Ingo
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