linux-kernel - [PATCH] mm: use list_move_tail instead of list_del/list_add

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Message-ID: <CAPgLHd-3Uwj1Uf31xqPO8LyYT0DS2Tcb1fa5KTYXdATEOHT9qw@mail.gmail.com>
Date:	Wed, 5 Sep 2012 14:36:54 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	akpm@...ux-foundation.org
Cc:	yongjun_wei@...ndmicro.com.cn, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] mm: use list_move_tail instead of list_del/list_add_tail

From: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>

Using list_move_tail() instead of list_del() + list_add_tail().

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 mm/rmap.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/rmap.c b/mm/rmap.c
index 0f3b7cd..6333654 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -307,8 +307,7 @@ void anon_vma_moveto_tail(struct vm_area_struct *dst)
 		struct anon_vma *anon_vma = pavc->anon_vma;
 		VM_BUG_ON(pavc->vma != dst);
 		root = lock_anon_vma_root(root, anon_vma);
-		list_del(&pavc->same_anon_vma);
-		list_add_tail(&pavc->same_anon_vma, &anon_vma->head);
+		list_move_tail(&pavc->same_anon_vma, &anon_vma->head);
 	}
 	unlock_anon_vma_root(root);
 }


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