From: Colin Cross <ccross@android.com>
Date: Mon, 8 Oct 2012 21:01:12 +0000 (-0700)
Subject: ARM: OMAP: counter: add locking to read_persistent_clock
X-Git-Tag: v3.2.32~35
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eb04142b260198116be79acafc28aca04606ff51;p=pandora-kernel.git

ARM: OMAP: counter: add locking to read_persistent_clock

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@android.com>
Signed-off-by: R Sricharan <r.sricharan@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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