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[Xen-devel] [PATCH] linux-2.6.18: add list_first_entry()

To: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-devel] [PATCH] linux-2.6.18: add list_first_entry()
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Wed, 03 Nov 2010 14:32:43 +0000
Delivery-date: Wed, 03 Nov 2010 07:33:24 -0700
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... to address build failure after c/s 1045:bd2bf7a84686.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>

--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -354,6 +354,17 @@ static inline void list_splice_init(stru
        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.
  * @head:      the head for your list.



Attachment: list-first-entry.patch
Description: Text document

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