From: Keir Fraser <keir@xen.org>
Date: Wed, 3 Nov 2010 17:34:34 +0000 (+0000)
Subject: linux-2.6.18: add list_first_entry()
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=fb8914d57beca97994f6ed7067dd28079421cba2;p=legacy%2Flinux-2.6.18-xen.git

linux-2.6.18: add list_first_entry()
... to address build failure after c/s 1045:bd2bf7a84686.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
---

diff --git a/include/linux/list.h b/include/linux/list.h
index 65a5b5ce..3beb546e 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -353,6 +353,17 @@ static inline void list_splice_init(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.