From: Jesse Gross <jesse@nicira.com>
Date: Wed, 28 Nov 2012 22:01:52 +0000 (-0800)
Subject: openvswitch: Use RCU callback when detaching netdevices.
X-Git-Tag: omap-for-v3.8/fixes-for-merge-window-v4-signed~45^2~169^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=92eb1d477145b2e7780b5002e856f70b8c3d74da;p=pandora-kernel.git

openvswitch: Use RCU callback when detaching netdevices.

Currently, each time a device is detached from an OVS datapath
we call synchronize RCU before freeing associated data structures.
However, if a bridge is deleted (which detaches all ports) when
many devices are connected then there can be a long delay.  This
switches to use call_rcu() to group the cost together.

Reported-by: Justin Pettit <jpettit@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
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