linux-kernel - [PATCH] llist: Use for() initializer and conditional

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Message-Id: <1446146370-19111-1-git-send-email-bobby.prani@gmail.com>
Date:	Thu, 29 Oct 2015 15:19:29 -0400
From:	Pranith Kumar <bobby.prani@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Rasmus Villemoes <linux@...musvillemoes.dk>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] llist: Use for() initializer and conditional

Simplify the code a bit by using the initializer and conditional
check in for() instead of a separate if() statement in the loop.

Signed-off-by: Pranith Kumar <bobby.prani@...il.com>
---
 lib/llist.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/lib/llist.c b/lib/llist.c
index ae5872b..ddbeebb 100644
--- a/lib/llist.c
+++ b/lib/llist.c
@@ -66,10 +66,7 @@ struct llist_node *llist_del_first(struct llist_head *head)
 {
 	struct llist_node *entry, *old_entry, *next;
 
-	entry = smp_load_acquire(&head->first);
-	for (;;) {
-		if (entry == NULL)
-			return NULL;
+	for (entry = smp_load_acquire(&head->first); entry ; ) {
 		old_entry = entry;
 		next = READ_ONCE(entry->next);
 		entry = cmpxchg(&head->first, old_entry, next);
-- 
2.6.1

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