linux-kernel - Re: [PATCH 055/270] ARM: OMAP: counter: add locking to read_persistent

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Message-ID: <1354028720.4266.55.camel@deadeye.wl.decadent.org.uk>
Date:	Tue, 27 Nov 2012 15:05:20 +0000
From:	Ben Hutchings <ben@...adent.org.uk>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com, Colin Cross <ccross@...roid.com>,
	R Sricharan <r.sricharan@...com>,
	Tony Lindgren <tony@...mide.com>,
	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
Subject: Re: [PATCH 055/270] ARM: OMAP: counter: add locking to
 read_persistent_clock

On Mon, 2012-11-26 at 14:55 -0200, Herton Ronaldo Krzesinski wrote:
> 3.5.7u1 -stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Colin Cross <ccross@...roid.com>
> 
> commit 9d7d6e363b06934221b81a859d509844c97380df upstream.
> 
> read_persistent_clock uses a global variable, use a spinlock to
> ensure non-atomic updates to the variable don't overlap and cause
> time to move backwards.
> 
> Signed-off-by: Colin Cross <ccross@...roid.com>
> Signed-off-by: R Sricharan <r.sricharan@...com>
> Signed-off-by: Tony Lindgren <tony@...mide.com>
> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
[...]

This is also missing from 3.4.  I'm attaching the adjusted version for
3.2, which looks like it will work for 3.4.

Ben.

-- 
Ben Hutchings
Never attribute to conspiracy what can adequately be explained by stupidity.

View attachment "arm-omap-counter-add-locking-to-read_persistent_clock.patch" of type "text/x-patch" (1943 bytes)

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