linux-kernel - Re: [PATCH 3/3] rcutorture: Remove redundant assignment to cur

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Date:	Wed, 7 Feb 2007 16:24:10 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Richard Knutsson <ricknu-0@...dent.ltu.se>,
	Josh Triplett <josh@...nel.org>, linux-kernel@...r.kernel.org,
	"Paul E. McKenney" <paulmck@...ibm.com>
Subject: Re: [PATCH 3/3] rcutorture: Remove redundant assignment to cur_ops
 in for loop

On Wed, 7 Feb 2007 16:22:28 -0800
Andrew Morton <akpm@...ux-foundation.org> wrote:

> I suspect we can do better than that...

err,,

--- a/kernel/rcutorture.c~rcutorture-remove-redundant-assignment-to-cur_ops-in
+++ a/kernel/rcutorture.c
@@ -569,10 +569,6 @@ static struct rcu_torture_ops sched_ops 
 	.name = "sched"
 };
 
-static struct rcu_torture_ops *torture_ops[] =
-	{ &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops,
-	  &srcu_ops, &qrcu_ops, &sched_ops, NULL };
-
 /*
  * RCU torture writer kthread.  Repeatedly substitutes a new structure
  * for that pointed to by rcu_torture_current, freeing the old structure
@@ -939,16 +935,17 @@ rcu_torture_init(void)
 	int i;
 	int cpu;
 	int firsterr = 0;
+	static struct rcu_torture_ops *torture_ops[] =
+		{ &rcu_ops, &rcu_sync_ops, &rcu_bh_ops, &rcu_bh_sync_ops,
+		  &srcu_ops, &qrcu_ops, &sched_ops, };
 
 	/* Process args and tell the world that the torturer is on the job. */
-
-	for (i = 0; cur_ops = torture_ops[i], cur_ops; i++) {
+	for (i = 0; i < ARRAY_SIZE(torture_ops); i++) {
 		cur_ops = torture_ops[i];
-		if (strcmp(torture_type, cur_ops->name) == 0) {
+		if (strcmp(torture_type, cur_ops->name) == 0)
 			break;
-		}
 	}
-	if (cur_ops == NULL) {
+	if (i == ARRAY_SIZE(torture_ops)) {
 		printk(KERN_ALERT "rcutorture: invalid torture type: \"%s\"\n",
 		       torture_type);
 		return (-EINVAL);
_

-
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