linux-kernel - [PATCH v2 2/9] bcache: Don't reinvent the wheel but use existing llist API

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Message-Id: <1486970469-30917-3-git-send-email-byungchul.park@lge.com>
Date:   Mon, 13 Feb 2017 16:21:02 +0900
From:   Byungchul Park <byungchul.park@....com>
To:     peterz@...radead.org, mingo@...nel.org, neilb@...e.de,
        nab@...ux-iscsi.org, viro@...iv.linux.org.uk
Cc:     ying.huang@...el.com, oleg@...hat.com, shli@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/9] 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>
---
 drivers/md/bcache/closure.c | 17 +++--------------
 1 file changed, 3 insertions(+), 14 deletions(-)

diff --git a/drivers/md/bcache/closure.c b/drivers/md/bcache/closure.c
index 864e673..1841d03 100644
--- a/drivers/md/bcache/closure.c
+++ b/drivers/md/bcache/closure.c
@@ -64,27 +64,16 @@ void closure_put(struct closure *cl)
 void __closure_wake_up(struct closure_waitlist *wait_list)
 {
 	struct llist_node *list;
-	struct closure *cl;
+	struct closure *cl, *t;
 	struct llist_node *reverse = NULL;
 
 	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_safe(cl, t, reverse, list) {
 		closure_set_waiting(cl, 0);
 		closure_sub(cl, CLOSURE_WAITING + 1);
 	}
-- 
1.9.1