drm: fix issues with systems with no MTRR

On systems with no MTRR we should still define the interface.

Original bug from apkm.
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/char/drm/drmP.h b/drivers/char/drm/drmP.h
index 307254da7d08..54b561e69486 100644
--- a/drivers/char/drm/drmP.h
+++ b/drivers/char/drm/drmP.h
@@ -767,6 +767,20 @@ static inline int drm_mtrr_del(int handle, unsigned long offset,
 
 #else
 #define drm_core_has_MTRR(dev) (0)
+
+#define DRM_MTRR_WC             0
+
+static inline int drm_mtrr_add(unsigned long offset, unsigned long size,
+                               unsigned int flags)
+{
+        return 0;
+}
+
+static inline int drm_mtrr_del(int handle, unsigned long offset,
+                               unsigned long size, unsigned int flags)
+{
+        return 0;
+}
 #endif
 
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