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From: Lai Jiangshan on 27 Mar 2010 23:20

cleanup: make dead code really dead

Signed-off-by: Lai Jiangshan <laijs(a)cn.fujitsu.com>
---
diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index e6014e1..1947c4e 100644
--- 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 */

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