From: Paul E. McKenney <paul.mckenney@linaro.org>
Date: Thu, 12 Jan 2012 21:08:18 +0000 (-0800)
Subject: rcu: Check for idle-loop entry while in RCU read-side critical section
X-Git-Tag: v3.4-rc1~194^2^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c44e2cddacc2cf299186bad5697d738ea19668b7;p=pandora-kernel.git

rcu: Check for idle-loop entry while in RCU read-side critical section

The inner idle loop is an extended quiescent state for all flavors
of RCU, but there have been recent bug involving use of RCU read-side
primitives from within the idle loop.  Therefore, this commit enlists
lockdep-RCU to detect attempts to enter the inner idle loop while in
an RCU read-side critical section, emitting a lockdep-RCU splat if so.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
---

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