[Xen-devel] [PATCH] missing mini-os list_top macro

[Diego Ongaro <diego.ongaro@xxxxxxxxxx>]

mini-os is missing list_top in its list.h
---
diff -r 37289395de03 extras/mini-os/include/list.h
--- a/extras/mini-os/include/list.h     Fri Jul 18 14:20:13 2008 +0100
+++ b/extras/mini-os/include/list.h     Fri Jul 18 15:05:42 2008 +0100
@@ -23,6 +23,12 @@
 #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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