X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Flinux%2Flist.h;h=a02642e4710ae06d4e005f61e3f35fe1a521ad37;hb=8cf60e04a131310199d5776e2f9e915f0c468899;hp=67258b47e9ca138e7a639a0a8745dad878164b42;hpb=3d1f337b3e7378923c89f37afb573a918ef40be5;p=powerpc.git

diff --git a/include/linux/list.h b/include/linux/list.h
index 67258b47e9..a02642e471 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -197,12 +197,35 @@ static inline void list_del_rcu(struct list_head *entry)
 	entry->prev = LIST_POISON2;
 }
 
+/**
+ * list_replace - replace old entry by new one
+ * @old : the element to be replaced
+ * @new : the new element to insert
+ * Note: if 'old' was empty, it will be overwritten.
+ */
+static inline void list_replace(struct list_head *old,
+				struct list_head *new)
+{
+	new->next = old->next;
+	new->next->prev = new;
+	new->prev = old->prev;
+	new->prev->next = new;
+}
+
+static inline void list_replace_init(struct list_head *old,
+					struct list_head *new)
+{
+	list_replace(old, new);
+	INIT_LIST_HEAD(old);
+}
+
 /*
  * list_replace_rcu - replace old entry by new one
  * @old : the element to be replaced
  * @new : the new element to insert
  *
  * The old entry will be replaced with the new entry atomically.
+ * Note: 'old' should not be empty.
  */
 static inline void list_replace_rcu(struct list_head *old,
 				struct list_head *new)
@@ -619,7 +642,7 @@ static inline void hlist_del_rcu(struct hlist_node *n)
 
 static inline void hlist_del_init(struct hlist_node *n)
 {
-	if (n->pprev)  {
+	if (!hlist_unhashed(n)) {
 		__hlist_del(n);
 		INIT_HLIST_NODE(n);
 	}