From 768f3591e2b1cc309fd6f10d6579b216026d7817 Mon Sep 17 00:00:00 2001
From: Pavel Emelyanov <xemul@openvz.org>
Date: Tue, 18 Sep 2007 13:20:41 -0700
Subject: [NETNS]: Cleanup list walking in setup_net and cleanup_net

I proposed introducing a list_for_each_entry_continue_reverse macro
to be used in setup_net() when unrolling the failed ->init callback.

Here is the macro and some more cleanup in the setup_net() itself
to remove one variable from the stack :) The same thing is for the
cleanup_net() - the existing list_for_each_entry_reverse() is used.

Minor, but the code looks nicer.

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/linux/list.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'include/linux/list.h')

diff --git a/include/linux/list.h b/include/linux/list.h
index f29fc9c1a964..ad9dcb9e3375 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -524,6 +524,20 @@ static inline void list_splice_init_rcu(struct list_head *list,
 	     prefetch(pos->member.next), &pos->member != (head);	\
 	     pos = list_entry(pos->member.next, typeof(*pos), member))
 
+/**
+ * list_for_each_entry_continue_reverse - iterate backwards from the given point
+ * @pos:	the type * to use as a loop cursor.
+ * @head:	the head for your list.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Start to iterate over list of given type backwards, continuing after
+ * the current position.
+ */
+#define list_for_each_entry_continue_reverse(pos, head, member)		\
+	for (pos = list_entry(pos->member.prev, typeof(*pos), member);	\
+	     prefetch(pos->member.prev), &pos->member != (head);	\
+	     pos = list_entry(pos->member.prev, typeof(*pos), member))
+
 /**
  * list_for_each_entry_from - iterate over list of given type from the current point
  * @pos:	the type * to use as a loop cursor.
-- 
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