Commit 28f85553 authored May 10, 2012 by Paul E. McKenney Committed by Paul E. McKenney Jul 02, 2012

rcu: The rcu_needs_cpu() function is not a quiescent state



The TINY_PREEMPT_RCU() function rcu_preempt_needs_cpu(), which is called
from rcu_needs_cpu(), assumes that it is in a quiescent state with respect
to the CPU.  This is no longer the case.  This commit therefore updates
rcu_preempt_needs_cpu() to make it aware that it is not running in a
quiescent state.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Tested-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Tested-by: Pascal Chapperon <pascal.chapperon@wanadoo.fr>

parent bf1304e9

kernel/rcutiny_plugin.h

+0 −2

Original line number	Diff line number	Diff line
		@@ -846,8 +846,6 @@ EXPORT_SYMBOL_GPL(synchronize_rcu_expedited);
		*/
		int rcu_preempt_needs_cpu(void)
		{
		if (!rcu_preempt_running_reader())
		rcu_preempt_cpu_qs();
		return rcu_preempt_ctrlblk.rcb.rcucblist != NULL;
		}