From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Fri, 20 Aug 2010 04:43:09 +0000 (-0700)
Subject: rcu: add comment stating that list_empty() applies to RCU-protected lists
X-Git-Tag: v2.6.37-rc1~215^2~14^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=65e6bf484c497f02d47a0faae69ee398cd59cfda;p=pandora-kernel.git

rcu: add comment stating that list_empty() applies to RCU-protected lists

Because list_empty() does not dereference any RCU-protected pointers, and
further does not pass such pointers to the caller (so that the caller
does not dereference them either), it is safe to use list_empty() on
RCU-protected lists.  There is no need for a list_empty_rcu().  This
commit adds a comment stating this explicitly.

Requested-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

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