[Midnightbsd-cvs] src: bus.h: Add a commonly used "hack" in FreeBSD with 6.2+ drivers.

[laffer1 at midnightbsd.org]

Log Message:
-----------
Add a commonly used "hack" in FreeBSD with 6.2+ drivers. This will make updating and porting drivers easier.

Tags:
----
RELENG_0_2

Modified Files:
--------------
    src/sys/sys:
        bus.h (r1.1.1.1.4.1 -> r1.1.1.1.4.2)

-------------- next part --------------
Index: bus.h
===================================================================
RCS file: /home/cvs/src/sys/sys/bus.h,v
retrieving revision 1.1.1.1.4.1
retrieving revision 1.1.1.1.4.2
diff -L sys/sys/bus.h -L sys/sys/bus.h -u -r1.1.1.1.4.1 -r1.1.1.1.4.2
--- sys/sys/bus.h
+++ sys/sys/bus.h
@@ -325,6 +325,14 @@
 }
 
 /*
+ * Forward compatibility define.   bus_get_dma_tag is defined in current
+ * to get the parent's dma tag.  In RELENG_6 this is currently spelled NULL,
+ * so provide a stop-gap compatibilty hook until this functionality is
+ * merged from head (if ever) (FreeBSD)
+ */
+#define bus_get_dma_tag(a) NULL
+
+/*
  * Access functions for device.
  */
 device_t	device_add_child(device_t dev, const char *name, int unit);