add list_prev_entry()

diff --git a/sys/dev/pci/drm/drm_linux_list.h b/sys/dev/pci/drm/drm_linux_list.h
index 7c5af7f..cbb3535 100644 (file)
--- a/sys/dev/pci/drm/drm_linux_list.h
+++ b/sys/dev/pci/drm/drm_linux_list.h
@@ -1,4 +1,4 @@
-/*     $OpenBSD: drm_linux_list.h,v 1.7 2017/07/01 16:14:10 kettenis Exp $     */
+/*     $OpenBSD: drm_linux_list.h,v 1.8 2018/01/31 04:35:38 jsg Exp $  */
 /* drm_linux_list.h -- linux list functions for the BSDs.
  * Created: Mon Apr 7 14:30:16 1999 by anholt@FreeBSD.org
  */
@@ -121,6 +121,9 @@ list_del_init(struct list_head *entry) {
 #define list_next_entry(pos, member)                           \
        list_entry(((pos)->member.next), typeof(*(pos)), member)
 
+#define list_prev_entry(pos, member)                           \
+       list_entry(((pos)->member.prev), typeof(*(pos)), member)
+
 #define list_for_each(entry, head)                             \
     for (entry = (head)->next; entry != head; entry = (entry)->next)