[Xen-changelog] [xen-unstable] mini-os is missing list_top in its list.h

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1216392279 -3600
# Node ID 60828077e1759c3a9d9506067597a8c1330c4afb
# Parent  092a15aa2430dedafc98bae7d52babb90df071a1
mini-os is missing list_top in its list.h

Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
---
 extras/mini-os/include/list.h |    6 ++++++
 1 files changed, 6 insertions(+)

diff -r 092a15aa2430 -r 60828077e175 extras/mini-os/include/list.h
--- a/extras/mini-os/include/list.h     Fri Jul 18 15:03:55 2008 +0100
+++ b/extras/mini-os/include/list.h     Fri Jul 18 15:44:39 2008 +0100
@@ -23,6 +23,12 @@ struct list_head {
 #define INIT_LIST_HEAD(ptr) do { \
        (ptr)->next = (ptr); (ptr)->prev = (ptr); \
 } while (0)
+
+#define list_top(head, type, member)                                     \
+({                                                                       \
+       struct list_head *_head = (head);                                 \
+       list_empty(_head) ? NULL : list_entry(_head->next, type, member); \
+})
 
 /*
  * Insert a new entry between two known consecutive entries. 

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