tree b2d3de62d15a77d23708c1af6f188c86f0d87fb9
parent 6887a4131da3adaab011613776d865f4bcfb5678
author Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1341238122 -0700
committer Paul E. McKenney <paulmck@linux.vnet.ibm.com> 1341254359 -0700

Revert "rcu: Move PREEMPT_RCU preemption to switch_to() invocation"

This reverts commit 616c310e83b872024271c915c1b9ab505b9efad9.
(Move PREEMPT_RCU preemption to switch_to() invocation).
Testing by Sasha Levin <levinsasha928@gmail.com> showed that this
can result in deadlock due to invoking the scheduler when one of
the runqueue locks is held.  Because this commit was simply a
performance optimization, revert it.

Reported-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Sasha Levin <levinsasha928@gmail.com>