[PATCH] rcu: make dead code really dead

[Lai Jiangshan]

cleanup: make dead code really dead

Signed-off-by: Lai Jiangshan <la...@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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[Paul E. McKenney]

On Sun, Mar 28, 2010 at 11:15:20AM +0800, Lai Jiangshan wrote:
>
> cleanup: make dead code really dead

Good catch! I have queued this one up for RCU for 2.6.35.

Thanx, Paul