[PATCH 055/270] ARM: OMAP: counter: add locking to read_persistent_clock

Ben Hutchings ben at decadent.org.uk
Tue Nov 27 15:05:20 UTC 2012

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 at android.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 at android.com>
> Signed-off-by: R Sricharan <r.sricharan at ti.com>
> Signed-off-by: Tony Lindgren <tony at atomide.com>
> Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.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 Hutchings
Never attribute to conspiracy what can adequately be explained by stupidity.
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