tree f2ae9d345ee731eff5685ac3db5db4dad9b76368
parent 73f4d5675933f34b7f3bc1c51fc74613955fffd2
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1444343814 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1444345947 -0700

rcu: Add transitivity to remaining rcu_node ->lock acquisitions

The rule is that all acquisitions of the rcu_node structure's ->lock
must provide transitivity:  The lock is not acquired that frequently,
and sorting out exactly which required it and which did not would be
a maintenance nightmare.  This commit therefore supplies the needed
transitivity to the remaining ->lock acquisitions.

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