agp/intel: use #ifdef idiom for intel-agp.h

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: stable@kernel.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/char/agp/intel-agp.h b/drivers/char/agp/intel-agp.h
index 08d47532e60590f169f74995007e745623c4cd66..78124a8402e5d7f94568bc29160a5d266ab49145 100644 (file)
--- a/drivers/char/agp/intel-agp.h
+++ b/drivers/char/agp/intel-agp.h
@@ -1,6 +1,8 @@
 /*
  * Common Intel AGPGART and GTT definitions.
  */
+#ifndef _INTEL_AGP_H
+#define _INTEL_AGP_H
 
 /* Intel registers */
 #define INTEL_APSIZE   0xb4
@@ -244,3 +246,5 @@
                agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_IRONLAKE_MA_HB || \
                agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_IRONLAKE_MC2_HB || \
                IS_SNB)
+
+#endif