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

[Steven Rostedt <rostedt@xxxxxxxxxxx>]

On Fri, 2011-03-25 at 21:31 +0200, Alexey Dobriyan wrote:

> > 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
> > 	 */
> 
> Try ((void)0)

Maybe I should update the comment to stop further confusion:

	/*
	 * Use ({0;}) as it works nicely in both an if statement and
	 * as a stand alone line statement.
	 *   "0;" causes "warning: statement with no effect"
	 *   ((void)0) does not work in an if () condition.
	 */

-- Steve


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