linux-kernel - Re: [GIT pull] time(r) fixes for .25

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Message-ID: <20080310164407.GC5040@ucw.cz>
Date:	Mon, 10 Mar 2008 17:44:07 +0100
From:	Pavel Machek <pavel@....cz>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [GIT pull] time(r) fixes for .25


> @@ -174,6 +174,10 @@ static inline void timespec_add_ns(struct timespec *a, u64 ns)
>  {
>  	ns += a->tv_nsec;
>  	while(unlikely(ns >= NSEC_PER_SEC)) {
> +		/* The following asm() prevents the compiler from
> +		 * optimising this loop into a modulo operation.  */
> +		asm("" : "+r"(ns));
> +

optimizing -> pessimizing or "optimizing" or explain that "optimized"
version is slower than real version?

Missing space between while and ( ?

							Pavel

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