md/raid5: remove condition test from check_break_stripe_batch_list.

handle_stripe_clean_event() contains a chunk of code very
similar to check_break_stripe_batch_list().
If we make the latter more like the former, we can end up
with just one copy of this code.

This  first step removed the condition (and the 'check_') part
of the name.  This has the added advantage of making it clear
what check is being performed at the point where the function is
called.
Signed-off-by: NeilBrown <neilb@suse.de>

drivers/md/raid5.c

@@ -4234,16 +4234,11 @@ static int clear_batch_ready(struct stripe_head *sh)
 	return 0;
 }
 
-static void check_break_stripe_batch_list(struct stripe_head *sh)
+static void break_stripe_batch_list(struct stripe_head *head_sh)
 {
-	struct stripe_head *head_sh, *next;
+	struct stripe_head *sh, *next;
 	int i;
 
-	if (!test_and_clear_bit(STRIPE_BATCH_ERR, &sh->state))
-		return;
-
-	head_sh = sh;
-
 	list_for_each_entry_safe(sh, next, &head_sh->batch_list, batch_list) {
 
 		list_del_init(&sh->batch_list);
@@ -4290,7 +4285,8 @@ static void handle_stripe(struct stripe_head *sh)
 		return;
 	}
 
-	check_break_stripe_batch_list(sh);
+	if (test_and_clear_bit(STRIPE_BATCH_ERR, &sh->state))
+		break_stripe_batch_list(sh);
 
 	if (test_bit(STRIPE_SYNC_REQUESTED, &sh->state) && !sh->batch_head) {
 		spin_lock(&sh->stripe_lock);