diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index d7d10cabb9bbfd15540f8fe04edb0bdd9fc6558d..a39ab2193bfe10890bb8aa3e85614ee03cecef25 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -377,6 +377,17 @@ int drm_legacy_addmap(struct drm_device *dev, resource_size_t offset,
 }
 EXPORT_SYMBOL(drm_legacy_addmap);
 
+struct drm_local_map *drm_legacy_findmap(struct drm_device *dev,
+					 unsigned int token)
+{
+	struct drm_map_list *_entry;
+	list_for_each_entry(_entry, &dev->maplist, head)
+		if (_entry->user_token == token)
+			return _entry->map;
+	return NULL;
+}
+EXPORT_SYMBOL(drm_legacy_findmap);
+
 /**
  * Ioctl to specify a range of memory that is available for mapping by a
  * non-root process.
diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h
index 84ac79219e4ce64ccf062931b5e323b5cbb789e7..6710b612e2f6f7050eab3885668da34822ef0579 100644
--- a/include/drm/drm_file.h
+++ b/include/drm/drm_file.h
@@ -32,6 +32,7 @@
 
 #include <linux/types.h>
 #include <linux/completion.h>
+#include <linux/idr.h>
 
 #include <uapi/drm/drm.h>
 
diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index a6de09c5e47f500b1c93b5302fc3a00fef267988..d6dfef8cff6a4996dbe9b90c50d9d75913a27a40 100644
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -9,6 +9,8 @@
 #ifndef _DRM_HDCP_H_INCLUDED_
 #define _DRM_HDCP_H_INCLUDED_
 
+#include <linux/types.h>
+
 /* Period of hdcp checks (to ensure we're still authenticated) */
 #define DRM_HDCP_CHECK_PERIOD_MS		(128 * 16)
 
diff --git a/include/drm/drm_legacy.h b/include/drm/drm_legacy.h
index 8fad66f88e4f3559b4aae78666cc6abaca950499..3e99ab69c122b9f3e29f4737e592a929bffeba8a 100644
--- a/include/drm/drm_legacy.h
+++ b/include/drm/drm_legacy.h
@@ -2,6 +2,9 @@
 #define __DRM_DRM_LEGACY_H__
 
 #include <drm/drm_auth.h>
+#include <drm/drm_hashtab.h>
+
+struct drm_device;
 
 /*
  * Legacy driver interfaces for the Direct Rendering Manager
@@ -156,6 +159,7 @@ struct drm_map_list {
 int drm_legacy_addmap(struct drm_device *d, resource_size_t offset,
 		      unsigned int size, enum drm_map_type type,
 		      enum drm_map_flags flags, struct drm_local_map **map_p);
+struct drm_local_map *drm_legacy_findmap(struct drm_device *dev, unsigned int token);
 void drm_legacy_rmmap(struct drm_device *d, struct drm_local_map *map);
 int drm_legacy_rmmap_locked(struct drm_device *d, struct drm_local_map *map);
 void drm_legacy_master_rmmaps(struct drm_device *dev,
@@ -194,14 +198,4 @@ void drm_legacy_ioremap(struct drm_local_map *map, struct drm_device *dev);
 void drm_legacy_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
 void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
 
-static inline struct drm_local_map *drm_legacy_findmap(struct drm_device *dev,
-						       unsigned int token)
-{
-	struct drm_map_list *_entry;
-	list_for_each_entry(_entry, &dev->maplist, head)
-	    if (_entry->user_token == token)
-		return _entry->map;
-	return NULL;
-}
-
 #endif /* __DRM_DRM_LEGACY_H__ */
diff --git a/include/drm/drm_syncobj.h b/include/drm/drm_syncobj.h
index 7c6ed845c70dc8824d8394138f603154f2dc6e12..0311c9fdbd2f2107ba39cf40dd64a0f97641b416 100644
--- a/include/drm/drm_syncobj.h
+++ b/include/drm/drm_syncobj.h
@@ -26,7 +26,9 @@
 #ifndef __DRM_SYNCOBJ_H__
 #define __DRM_SYNCOBJ_H__
 
-#include "linux/dma-fence.h"
+#include <linux/dma-fence.h>
+
+struct drm_file;
 
 /**
  * struct drm_syncobj - sync object.
diff --git a/include/drm/intel-gtt.h b/include/drm/intel-gtt.h
index 2324c84a25c02eca5d26e0f639fe32beb9979cfc..71d81923e6b06ca1614ac7188c584a62ba4d7bba 100644
--- a/include/drm/intel-gtt.h
+++ b/include/drm/intel-gtt.h
@@ -4,6 +4,9 @@
 #ifndef _DRM_INTEL_GTT_H
 #define	_DRM_INTEL_GTT_H
 
+#include <linux/agp_backend.h>
+#include <linux/kernel.h>
+
 void intel_gtt_get(u64 *gtt_total,
 		   phys_addr_t *mappable_base,
 		   resource_size_t *mappable_end);