linux-kernel - Re: [PATCH] bug: Use xchg() to update WARN_ON

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Message-ID: <20131015204129.GD3269@localhost.localdomain>
Date:	Tue, 15 Oct 2013 22:41:30 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"Liu, Chuansheng" <chuansheng.liu@...el.com>
Subject: Re: [PATCH] bug: Use xchg() to update WARN_ON_ONCE() static variable

On Tue, Oct 15, 2013 at 04:36:22PM -0400, Steven Rostedt wrote:
> On Tue, 15 Oct 2013 22:21:36 +0200
> Frederic Weisbecker <fweisbec@...il.com> wrote:
> 
> > Oh, I have a pending patchset that I worked on a few weeks ago which does that.
> > I did not post it because it made WARN_ONCE using the unlikely text section, but
> > the diffstat was nice.
> > 
> > I'm going to post that as RFC just in case.
> 
> Oh well, I guess I don't need to work on that anymore ;-)

Well, the idea of setting __warned before the warning is still something we want
to fix seperately I think :)
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