From: Brice Goglin <brice@myri.com>
Date: Thu, 16 Apr 2009 14:23:56 +0200

quoted text
> Force a statistics update when our ethtool gstats routine
> is called.  Otherwise, ethtool will continue to read stale
> stats until something forces an update by reading /proc/net/dev
> 
> This requires putting a lock around the stats update to guard
> against 2 threads (one via ethtool, and one via procfs)
> updating the stats at once.
> 
> Signed-off-by: Brice Goglin <brice@myri.com>

Applied.
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