linux-kernel - Re: [PATCH 2/2] time: allow gcc to fold constants when possible

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Message-ID: <1432836156.2846.237.camel@perches.com>
Date:	Thu, 28 May 2015 11:02:36 -0700
From:	Joe Perches <joe@...ches.com>
To:	Nicholas Mc Guire <hofrat@...dl.org>
Cc:	Michal Marek <mmarek@...e.cz>,
	Masahiro Yamada <yamada.m@...panasonic.com>,
	Sam Ravnborg <sam@...nborg.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Alvin" <hpa@...or.com>,
	John Stultz <john.stultz@...aro.org>,
	Andrew Hunter <ahh@...gle.com>, Paul Turner <pjt@...gle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] time: allow gcc to fold constants when possible

On Thu, 2015-05-28 at 19:09 +0200, Nicholas Mc Guire wrote:
> To allow constant folding in usecs_to_jiffies() conditionally calls
> the HZ dependent _usecs_to_jiffies() helpers or, when gcc can not
> figure out constant folding, __usecs_to_jiffies, which is the renamed
> original usecs_to_jiffies() function.

Hi Nicholas.

Thanks for following through with this.

The subject might be nicer if it referenced usecs_to_jiffies
instead of being a bit generic.

Maybe something like:

time: allow gcc to fold usecs_to_jiffies(constant)

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