From: Paul E. McKenney <paul.mckenney@linaro.org>
Date: Thu, 12 Jan 2012 21:49:19 +0000 (-0800)
Subject: rcu: Make rcu_sleep_check() also check rcu_lock_map
X-Git-Tag: v3.4-rc1~194^2^2~23
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=50406b98b6372e7de21d903d2cf3914e9d64e094;p=pandora-kernel.git

rcu: Make rcu_sleep_check() also check rcu_lock_map

Although it is OK to be preempted in an RCU read-side critical section
for TREE_PREEMPT_RCU, it is definitely not OK to be preempted, block,
or might_sleep() within an RCU read-side critical section for TREE_RCU.
Unfortunately, rcu_might_sleep() currently only checks for RCU-bh and
RCU-sched read-side critical sections.  This commit therefore makes
rcu_might_sleep() check for RCU read-side critical sections, but only
in TREE_RCU builds.

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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