rcu: Use WARN_ON_ONCE for DEBUG_OBJECTS_RCU_HEAD warnings
Avoid additional multiple-warning confusion in memory-corruption scenarios.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
diff --git a/kernel/rcupdate.c b/kernel/rcupdate.c
index b54d6d1..7784bd2 100644
--- a/kernel/rcupdate.c
+++ b/kernel/rcupdate.c
@@ -147,12 +147,12 @@
* attempt any fixup and just print a warning.
*/
#ifndef CONFIG_PREEMPT
- WARN_ON(1);
+ WARN_ON_ONCE(1);
return 0;
#endif
if (rcu_preempt_depth() != 0 || preempt_count() != 0 ||
irqs_disabled()) {
- WARN_ON(1);
+ WARN_ON_ONCE(1);
return 0;
}
rcu_barrier();
@@ -196,12 +196,12 @@
* attempt any fixup and just print a warning.
*/
#ifndef CONFIG_PREEMPT
- WARN_ON(1);
+ WARN_ON_ONCE(1);
return 0;
#endif
if (rcu_preempt_depth() != 0 || preempt_count() != 0 ||
irqs_disabled()) {
- WARN_ON(1);
+ WARN_ON_ONCE(1);
return 0;
}
rcu_barrier();
@@ -233,12 +233,12 @@
* attempt any fixup and just print a warning.
*/
#ifndef CONFIG_PREEMPT
- WARN_ON(1);
+ WARN_ON_ONCE(1);
return 0;
#endif
if (rcu_preempt_depth() != 0 || preempt_count() != 0 ||
irqs_disabled()) {
- WARN_ON(1);
+ WARN_ON_ONCE(1);
return 0;
}
rcu_barrier();