[PATCH] cpuset: update_nodemask code reformat

Restructure code layout of the kernel/cpuset.c update_nodemask() routine,
removing embedded returns and nested if's in favor of goto completion labels.
This is being done in anticipation of adding more logic to this routine, which
will favor the goto style structure.
Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

kernel/cpuset.c

@@ -799,18 +799,23 @@ static int update_nodemask(struct cpuset *cs, char *buf)
 	trialcs = *cs;
 	retval = nodelist_parse(buf, trialcs.mems_allowed);
 	if (retval < 0)
-		return retval;
+		goto done;
 	nodes_and(trialcs.mems_allowed, trialcs.mems_allowed, node_online_map);
-	if (nodes_empty(trialcs.mems_allowed))
-		return -ENOSPC;
-	retval = validate_change(cs, &trialcs);
-	if (retval == 0) {
-		down(&callback_sem);
-		cs->mems_allowed = trialcs.mems_allowed;
-		atomic_inc(&cpuset_mems_generation);
-		cs->mems_generation = atomic_read(&cpuset_mems_generation);
-		up(&callback_sem);
+	if (nodes_empty(trialcs.mems_allowed)) {
+		retval = -ENOSPC;
+		goto done;
 	}
+	retval = validate_change(cs, &trialcs);
+	if (retval < 0)
+		goto done;
+
+	down(&callback_sem);
+	cs->mems_allowed = trialcs.mems_allowed;
+	atomic_inc(&cpuset_mems_generation);
+	cs->mems_generation = atomic_read(&cpuset_mems_generation);
+	up(&callback_sem);
+
+done:
 	return retval;
 }