linux-kernel - Re: [PATCH v2 net-next] net: convert lls to use time_in

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Message-ID: <1372797778.1919.17.camel@bwh-desktop.uk.level5networks.com>
Date:	Tue, 2 Jul 2013 21:42:58 +0100
From:	Ben Hutchings <bhutchings@...arflare.com>
To:	Eliezer Tamir <eliezer.tamir@...ux.intel.com>
CC:	David Miller <davem@...emloft.net>, <linux-kernel@...r.kernel.org>,
	<netdev@...r.kernel.org>, <willemb@...gle.com>,
	<erdnetdev@...il.com>, <andi@...stfloor.org>, <hpa@...or.com>,
	<devel-lists@...yps.com>, <eliezer@...ir.org.il>
Subject: Re: [PATCH v2 net-next] net: convert lls to use time_in_range()

On Tue, 2013-07-02 at 23:28 +0300, Eliezer Tamir wrote:
> On 02/07/2013 23:10, Ben Hutchings wrote:
> > On Tue, 2013-07-02 at 12:49 +0300, Eliezer Tamir wrote:
> >> Time in range will fail safely if we move to a different cpu with an
> >> extremely large clock skew.
> >> Add time_in_range64() and convert lls to use it.
> >>
> >> Signed-off-by: Eliezer Tamir <eliezer.tamir@...ux.intel.com>
> >> ---
> >> v1->v2
> >> fixed double call to sched_clock() in can_poll_ll(), checkpatchisms
> 
> >> +#define time_in_range64(a, b, c) \
> >> +	(time_after_eq64(a, b) && \
> >> +	 time_before_eq64(a, c))
> > [...]
> >
> > Why not make this an inline function, so the caller doesn't need to
> > worry about repeated evaluation?
> 
> I was following the conventions in jiffies.h
> (well almost, I did add a few spaces to make checkpatch happy)

I see, but now you have a good reason to change that convention.

Ben.

-- 
Ben Hutchings, Staff Engineer, Solarflare
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.

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