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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>
This commit is contained in:
Paul E. McKenney 2011-05-16 02:52:04 -07:00
parent 1135633bdd
commit b5904090c7
1 changed files with 3 additions and 2 deletions
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5
kernel/rcutree.c
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@ -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();
}