X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Flist.h;h=75ce2cb4ff6ebc92a8fcaa557a9bd7b6b9b9b1b6;hb=47cccd7d7cc1f2b6f34aadc9041fb991c6293cdd;hp=f9d71eab05eecc9a7d3891d346b86aa58d24233b;hpb=48c871c1f6a7c7044dd76774fb469e65c7e2e4e8;p=linux-2.6-omap-h63xx.git

diff --git a/include/linux/list.h b/include/linux/list.h
index f9d71eab05e..75ce2cb4ff6 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -264,8 +264,8 @@ static inline void list_del_init(struct list_head *entry)
  */
 static inline void list_move(struct list_head *list, struct list_head *head)
 {
-        __list_del(list->prev, list->next);
-        list_add(list, head);
+	__list_del(list->prev, list->next);
+	list_add(list, head);
 }
 
 /**
@@ -276,8 +276,8 @@ static inline void list_move(struct list_head *list, struct list_head *head)
 static inline void list_move_tail(struct list_head *list,
 				  struct list_head *head)
 {
-        __list_del(list->prev, list->next);
-        list_add_tail(list, head);
+	__list_del(list->prev, list->next);
+	list_add_tail(list, head);
 }
 
 /**
@@ -425,6 +425,17 @@ static inline void list_splice_init_rcu(struct list_head *list,
 #define list_entry(ptr, type, member) \
 	container_of(ptr, type, member)
 
+/**
+ * list_first_entry - get the first element from a list
+ * @ptr:	the list head to take the element from.
+ * @type:	the type of the struct this is embedded in.
+ * @member:	the name of the list_struct within the struct.
+ *
+ * Note, that list is expected to be not empty.
+ */
+#define list_first_entry(ptr, type, member) \
+	list_entry((ptr)->next, type, member)
+
 /**
  * list_for_each	-	iterate over a list
  * @pos:	the &struct list_head to use as a loop cursor.
@@ -466,6 +477,17 @@ static inline void list_splice_init_rcu(struct list_head *list,
 	for (pos = (head)->next, n = pos->next; pos != (head); \
 		pos = n, n = pos->next)
 
+/**
+ * list_for_each_prev_safe - iterate over a list backwards safe against removal of list entry
+ * @pos:	the &struct list_head to use as a loop cursor.
+ * @n:		another &struct list_head to use as temporary storage
+ * @head:	the head for your list.
+ */
+#define list_for_each_prev_safe(pos, n, head) \
+	for (pos = (head)->prev, n = pos->prev; \
+	     prefetch(pos->prev), pos != (head); \
+	     pos = n, n = pos->prev)
+
 /**
  * list_for_each_entry	-	iterate over list of given type
  * @pos:	the type * to use as a loop cursor.
@@ -513,6 +535,20 @@ 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.