Commit-ID: 28f8555364ef5b54b21251c5c8022109a70626e9
Gitweb: http://git.kernel.org/tip/28f8555364ef5b54b21251c5c8022109a70626e9
Author: Paul E. McKenney <paul.mckenney@xxxxxxxxxx>
AuthorDate: Thu, 10 May 2012 15:37:48 -0700
Committer: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
CommitDate: Mon, 2 Jul 2012 12:34:42 -0700
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@xxxxxxxxxx>
Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx>
Tested-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Tested-by: Pascal Chapperon <pascal.chapperon@xxxxxxxxxx>
---
kernel/rcutiny_plugin.h | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/kernel/rcutiny_plugin.h b/kernel/rcutiny_plugin.h
index fc31a2d..849ede5 100644
--- a/kernel/rcutiny_plugin.h
+++ b/kernel/rcutiny_plugin.h
@@ -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;
}
--
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