md: change ITERATE_RDEV to rdev_for_each

As this is more in line with common practice in the kernel.  Also swap the
args around to be more like list_for_each.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index e946de6..63bfb07 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4136,7 +4136,7 @@
 
 	pr_debug("raid5: run(%s) called.\n", mdname(mddev));
 
-	ITERATE_RDEV(mddev,rdev,tmp) {
+	rdev_for_each(rdev, tmp, mddev) {
 		raid_disk = rdev->raid_disk;
 		if (raid_disk >= conf->raid_disks
 		    || raid_disk < 0)
@@ -4549,7 +4549,7 @@
 	if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
 		return -EBUSY;
 
-	ITERATE_RDEV(mddev, rdev, rtmp)
+	rdev_for_each(rdev, rtmp, mddev)
 		if (rdev->raid_disk < 0 &&
 		    !test_bit(Faulty, &rdev->flags))
 			spares++;
@@ -4571,7 +4571,7 @@
 	/* Add some new drives, as many as will fit.
 	 * We know there are enough to make the newly sized array work.
 	 */
-	ITERATE_RDEV(mddev, rdev, rtmp)
+	rdev_for_each(rdev, rtmp, mddev)
 		if (rdev->raid_disk < 0 &&
 		    !test_bit(Faulty, &rdev->flags)) {
 			if (raid5_add_disk(mddev, rdev)) {