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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>
This commit is contained in:
Paul E. McKenney 2011-02-23 09:56:00 -08:00
parent 561190e3b3
commit 108aae2233
1 changed files with 6 additions and 6 deletions
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12
kernel/rcupdate.c
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@ -147,12 +147,12 @@ static int rcuhead_fixup_init(void *addr, enum debug_obj_state state)
* 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 @@ static int rcuhead_fixup_activate(void *addr, enum debug_obj_state state)
* 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 @@ static int rcuhead_fixup_free(void *addr, enum debug_obj_state state)
* 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();