[PATCH] mm: use list_move_tail instead of list_del/list_add_tail

[Wei Yongjun]

From: Wei Yongjun <yongjun_...@trendmicro.com.cn>

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

Signed-off-by: Wei Yongjun <yongjun_...@trendmicro.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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