diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index c81ff4769e7bec9bbbc3e4ddf48e0c9c1a630d70..902cf6a152128231f60bb15aab51028262d17f8f 100644
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -37,8 +37,6 @@ int drm_irq_by_busid(struct drm_device *dev, void *data,
 
 /* drm_vm.c */
 int drm_vma_info(struct seq_file *m, void *data);
-void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
-void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
 
 /* drm_prime.c */
 int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
diff --git a/drivers/gpu/drm/drm_vm.c b/drivers/gpu/drm/drm_vm.c
index f90bd5fe35babbc6b6eb216cefd0f0dad054932d..ac9f4b3ec615c5fb73cd00c4947d985ab4fa18b4 100644
--- a/drivers/gpu/drm/drm_vm.c
+++ b/drivers/gpu/drm/drm_vm.c
@@ -395,16 +395,8 @@ static const struct vm_operations_struct drm_vm_sg_ops = {
 	.close = drm_vm_close,
 };
 
-/**
- * \c open method for shared virtual memory.
- *
- * \param vma virtual memory area.
- *
- * Create a new drm_vma_entry structure as the \p vma private data entry and
- * add it to drm_device::vmalist.
- */
-void drm_vm_open_locked(struct drm_device *dev,
-		struct vm_area_struct *vma)
+static void drm_vm_open_locked(struct drm_device *dev,
+			       struct vm_area_struct *vma)
 {
 	struct drm_vma_entry *vma_entry;
 
@@ -429,8 +421,8 @@ static void drm_vm_open(struct vm_area_struct *vma)
 	mutex_unlock(&dev->struct_mutex);
 }
 
-void drm_vm_close_locked(struct drm_device *dev,
-		struct vm_area_struct *vma)
+static void drm_vm_close_locked(struct drm_device *dev,
+				struct vm_area_struct *vma)
 {
 	struct drm_vma_entry *pt, *temp;