From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Mon, 28 Nov 2011 18:42:42 +0000 (-0800)
Subject: rcu: Document same-context read-side constraints
X-Git-Tag: v3.3-rc1~193^2^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3842a0832a1d6eb0b31421f8810a813135967512;p=pandora-kernel.git

rcu: Document same-context read-side constraints

The intent is that a given RCU read-side critical section be confined
to a single context.  For example, it is illegal to invoke rcu_read_lock()
in an exception handler and then invoke rcu_read_unlock() from the
context of the task that received the exception.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
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