linux-kernel - [PATCH v4] bcache: Don't reinvent the wheel but use existing llist API

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Date:   Fri, 11 Aug 2017 13:42:23 +0900
From:   Byungchul Park <byungchul.park@....com>
To:     kent.overstreet@...il.com, shli@...nel.org
Cc:     linux-bcache@...r.kernel.org, linux-raid@...r.kernel.org,
        i@...y.li, nborisov@...e.com, linux-kernel@...r.kernel.org,
        kernel-team@....com
Subject: [PATCH v4] bcache: Don't reinvent the wheel but use existing llist API

Although llist provides proper APIs, they are not used. Make them used.

Signed-off-by: Byungchul Park <byungchul.park@....com>
Acked-by: Coly Li <colyli@...e.de>
---
 drivers/md/bcache/closure.c | 15 ++-------------
 1 file changed, 2 insertions(+), 13 deletions(-)

diff --git a/drivers/md/bcache/closure.c b/drivers/md/bcache/closure.c
index 864e673..7d5286b 100644
--- a/drivers/md/bcache/closure.c
+++ b/drivers/md/bcache/closure.c
@@ -70,21 +70,10 @@ void __closure_wake_up(struct closure_waitlist *wait_list)
 	list = llist_del_all(&wait_list->list);
 
 	/* We first reverse the list to preserve FIFO ordering and fairness */
-
-	while (list) {
-		struct llist_node *t = list;
-		list = llist_next(list);
-
-		t->next = reverse;
-		reverse = t;
-	}
+	reverse = llist_reverse_order(list);
 
 	/* Then do the wakeups */
-
-	while (reverse) {
-		cl = container_of(reverse, struct closure, list);
-		reverse = llist_next(reverse);
-
+	llist_for_each_entry(cl, reverse, list) {
 		closure_set_waiting(cl, 0);
 		closure_sub(cl, CLOSURE_WAITING + 1);
 	}
-- 
1.9.1