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rcupdate: remove dead code 

DEBUG_OBJECTS_RCU_HEAD depends on PREEMPT, so #ifndef CONFIG_PREEMPT
is totally useless in kernel/rcupdate.c.

Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Amerigo Wang 2011-01-30 18:23:08 +08:00 committed by Paul E. McKenney
parent fea651267e
commit fe8e64071a
1 changed files with 0 additions and 5 deletions
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5
kernel/rcupdate.c
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@ -215,10 +215,6 @@ static int rcuhead_fixup_free(void *addr, enum debug_obj_state state)
* If we detect that we are nested in a RCU read-side critical * If we detect that we are nested in a RCU read-side critical
* section, we should simply fail, otherwise we would deadlock. * section, we should simply fail, otherwise we would deadlock.
*/ */
#ifndef CONFIG_PREEMPT
WARN_ON(1);
return 0;
#else
if (rcu_preempt_depth() != 0 || preempt_count() != 0 || if (rcu_preempt_depth() != 0 || preempt_count() != 0 ||
irqs_disabled()) { irqs_disabled()) {
WARN_ON(1); WARN_ON(1);
@ -229,7 +225,6 @@ static int rcuhead_fixup_free(void *addr, enum debug_obj_state state)
rcu_barrier_bh(); rcu_barrier_bh();
debug_object_free(head, &rcuhead_debug_descr); debug_object_free(head, &rcuhead_debug_descr);
return 1; return 1;
#endif
default: default:
return 0; return 0;
} }