rcu: make dead code really dead

cleanup: make dead code really dead

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index e54c123..6042fb8 100644 (file)
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1236,11 +1236,11 @@ static void force_quiescent_state(struct rcu_state *rsp, int relaxed)
                break; /* grace period idle or initializing, ignore. */
 
        case RCU_SAVE_DYNTICK:
-
-               raw_spin_unlock(&rnp->lock);  /* irqs remain disabled */
                if (RCU_SIGNAL_INIT != RCU_SAVE_DYNTICK)
                        break; /* So gcc recognizes the dead code. */
 
+               raw_spin_unlock(&rnp->lock);  /* irqs remain disabled */
+
                /* Record dyntick-idle state. */
                force_qs_rnp(rsp, dyntick_save_progress_counter);
                raw_spin_lock(&rnp->lock);  /* irqs already disabled */