linux-kernel - [PATCH] audit: use list_move instead of list_del/list

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Date:	Thu, 6 Sep 2012 13:25:33 +0800
From:	Wei Yongjun <weiyj.lk@...il.com>
To:	viro@...iv.linux.org.uk, eparis@...hat.com
Cc:	yongjun_wei@...ndmicro.com.cn, linux-kernel@...r.kernel.org
Subject: [PATCH] audit: use list_move instead of list_del/list_add in audit-tree

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

Using list_move() instead of list_del() + list_add().

spatch with a semantic match is used to found this problem.
(http://coccinelle.lip6.fr/)

Signed-off-by: Wei Yongjun <yongjun_wei@...ndmicro.com.cn>
---
 kernel/audit_tree.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/kernel/audit_tree.c b/kernel/audit_tree.c
index ed206fd..56c4a9e 100644
--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -585,8 +585,7 @@ void audit_trim_trees(void)
 
 		tree = container_of(cursor.next, struct audit_tree, list);
 		get_tree(tree);
-		list_del(&cursor);
-		list_add(&cursor, &tree->list);
+		list_move(&cursor, &tree->list);
 		mutex_unlock(&audit_filter_mutex);
 
 		err = kern_path(tree->pathname, 0, &path);
@@ -738,8 +737,7 @@ int audit_tag_tree(char *old, char *new)
 
 		tree = container_of(cursor.next, struct audit_tree, list);
 		get_tree(tree);
-		list_del(&cursor);
-		list_add(&cursor, &tree->list);
+		list_move(&cursor, &tree->list);
 		mutex_unlock(&audit_filter_mutex);
 
 		err = kern_path(tree->pathname, 0, &path2);
@@ -764,8 +762,7 @@ int audit_tag_tree(char *old, char *new)
 		mutex_lock(&audit_filter_mutex);
 		spin_lock(&hash_lock);
 		if (!tree->goner) {
-			list_del(&tree->list);
-			list_add(&tree->list, &tree_list);
+			list_move(&tree->list, &tree_list);
 		}
 		spin_unlock(&hash_lock);
 		put_tree(tree);
@@ -776,8 +773,7 @@ int audit_tag_tree(char *old, char *new)
 
 		tree = container_of(barrier.prev, struct audit_tree, list);
 		get_tree(tree);
-		list_del(&tree->list);
-		list_add(&tree->list, &barrier);
+		list_move(&tree->list, &barrier);
 		mutex_unlock(&audit_filter_mutex);
 
 		if (!failed) {


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