linux-kernel - Re: [PATCH 4/4] trace: profile all if conditionals

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Message-Id: <20081121152030.7024971e.akpm@linux-foundation.org>
Date:	Fri, 21 Nov 2008 15:20:30 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de,
	peterz@...radead.org, tytso@....edu, arjan@...radead.org,
	srostedt@...hat.com
Subject: Re: [PATCH 4/4] trace: profile all if conditionals

On Fri, 21 Nov 2008 02:12:17 -0500
Steven Rostedt <rostedt@...dmis.org> wrote:

> --- a/include/linux/compiler.h
> +++ b/include/linux/compiler.h
>
> ...
>
> +#define if(cond) if (__builtin_constant_p((cond)) ? !!(cond) :		\

wheee...

Now how are you going to profile ?:, while, for(;expr;), etc? ;)
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