From: Lai Jiangshan <laijs@cn.fujitsu.com>
Date: Mon, 27 Feb 2012 17:28:10 +0000 (-0800)
Subject: rcu: Improve SRCU's wait_idx() comments
X-Git-Tag: v3.5-rc1~164^2^2^4~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=18108ebfebe9e871d0a9af830baf8f5df69eb5fc;p=pandora-kernel.git

rcu: Improve SRCU's wait_idx() comments

The safety of SRCU is provided byy wait_idx() rather than flipping.
The flipping actually prevents starvation.

This commit therefore updates the comments to more accurately and
precisely describe what is going on.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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