VM: add "vm_mmap()" helper function
[~shefty/rdma-dev.git] / drivers / gpu / drm / drm_bufs.c
index 30372f7..348b367 100644 (file)
@@ -1510,8 +1510,8 @@ int drm_freebufs(struct drm_device *dev, void *data,
  * \param arg pointer to a drm_buf_map structure.
  * \return zero on success or a negative number on failure.
  *
- * Maps the AGP, SG or PCI buffer region with do_mmap(), and copies information
- * about each buffer into user space. For PCI buffers, it calls do_mmap() with
+ * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information
+ * about each buffer into user space. For PCI buffers, it calls vm_mmap() with
  * offset equal to 0, which drm_mmap() interpretes as PCI buffers and calls
  * drm_mmap_dma().
  */
@@ -1553,18 +1553,14 @@ int drm_mapbufs(struct drm_device *dev, void *data,
                                retcode = -EINVAL;
                                goto done;
                        }
-                       down_write(&current->mm->mmap_sem);
-                       virtual = do_mmap(file_priv->filp, 0, map->size,
+                       virtual = vm_mmap(file_priv->filp, 0, map->size,
                                          PROT_READ | PROT_WRITE,
                                          MAP_SHARED,
                                          token);
-                       up_write(&current->mm->mmap_sem);
                } else {
-                       down_write(&current->mm->mmap_sem);
-                       virtual = do_mmap(file_priv->filp, 0, dma->byte_count,
+                       virtual = vm_mmap(file_priv->filp, 0, dma->byte_count,
                                          PROT_READ | PROT_WRITE,
                                          MAP_SHARED, 0);
-                       up_write(&current->mm->mmap_sem);
                }
                if (virtual > -1024UL) {
                        /* Real error */