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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-05-16 02:52:04 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2011-05-26 09:42:21 -0700
commitb5904090c754327ed6c2ecaefed4f7d473df393f (patch)
tree46cf53f98413171d92de3b5e11c9327309f240b7
parent1135633bddcf7a819a1490c18d04965c490bcc1e (diff)
downloadop-kernel-dev-b5904090c754327ed6c2ecaefed4f7d473df393f.zip
op-kernel-dev-b5904090c754327ed6c2ecaefed4f7d473df393f.tar.gz
rcu: Don't do reschedule unless in irq
Condition the set_need_resched() in rcu_irq_exit() on in_irq(). This should be a no-op, because rcu_irq_exit() should only be called from irq. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
-rw-r--r--kernel/rcutree.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 011bf6f..195b3a3 100644
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -421,8 +421,9 @@ void rcu_irq_exit(void)
WARN_ON_ONCE(rdtp->dynticks & 0x1);
/* If the interrupt queued a callback, get out of dyntick mode. */
- if (__this_cpu_read(rcu_sched_data.nxtlist) ||
- __this_cpu_read(rcu_bh_data.nxtlist))
+ if (in_irq() &&
+ (__this_cpu_read(rcu_sched_data.nxtlist) ||
+ __this_cpu_read(rcu_bh_data.nxtlist)))
set_need_resched();
}
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