linux-kernel - Re: [PATCH] tile: add clock

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Message-ID: <542D5E6D.5040908@tilera.com>
Date:	Thu, 2 Oct 2014 10:17:17 -0400
From:	Chris Metcalf <cmetcalf@...era.com>
To:	Henrik Austad <henrik@...tad.us>
CC:	<linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <john.stultz@...aro.org>
Subject: Re: [PATCH] tile: add clock_gettime support to vDSO

On 10/1/2014 5:24 PM, Henrik Austad wrote:
> On Tue, Sep 30, 2014 at 03:29:45PM -0400, Chris Metcalf wrote:
>> >This change adds support for clock_gettime with CLOCK_REALTIME
>> >and CLOCK_MONOTONIC using vDSO.  In addition, with this change
>> >we switch to use seqlocks instead of integer counters.
>> >
>> >We also support the *_COARSE clockid_t, for apps that want speed
>> >but aren't concerned about fine-grained timestamps; this saves
>> >about 20 cycles per call (seehttp://lwn.net/Articles/342018/).
>> >
>> >Signed-off-by: Chris Metcalf<cmetcalf@...era.com>
> What rev is this based on? When I apply it to Linus latest (aad7fb916), it
> fails in arch/tile/kernel/time.c and arch/tile/kernel/vdso/vgettimeofday.c
> (see below)

It's based on the linux-tile tree (on kernel.org under cmetcalf/linux-tile.git), which was last synced up at 3.16-rc7. I'll refresh the tree to pick up Thomas's recent changes that were queued for 3.17.  Thanks.

-- 
Chris Metcalf, Tilera Corp.
http://www.tilera.com

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