linux-kernel - Re: [tip:core/urgent] WARN_ON_SMP(): Allow use in if() statements on UP

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Date:	Fri, 25 Mar 2011 14:19:23 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	dvhart@...ux.intel.com, peterz@...radead.org,
	akpm@...ux-foundation.org, srostedt@...hat.com, tglx@...utronix.de,
	laijs@...fujitsu.com, mingo@...e.hu,
	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:core/urgent] WARN_ON_SMP(): Allow use in if() statements
 on UP

On Fri, 2011-03-25 at 14:16 -0400, Steven Rostedt wrote:

> Also, a quick test shows that
> 
> 	0;
> 
> gives the warning:
> 
> 	"warning: statement with no effect"

Would you like me to add a comment that states:

	/*
	 * Use ({0;}) as just "0" will cause gcc to output:
	 *   warning: statement with no effect
	 */

-- Steve


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