1 files changed, 4 insertions, 2 deletions

diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index bd2e52ccc4f2..9978b614a1aa 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -53,7 +53,7 @@ struct dma_buf_attachment;
  * @begin_cpu_access: [optional] called before cpu access to invalidate cpu
  *                    caches and allocate backing storage (if not yet done)
  *                    respectively pin the objet into memory.
- * @end_cpu_access: [optional] called after cpu access to flush cashes.
+ * @end_cpu_access: [optional] called after cpu access to flush caches.
  * @kmap_atomic: maps a page from the buffer into kernel address
  *               space, users may not block until the subsequent unmap call.
  *               This callback must not sleep.
@@ -119,8 +119,10 @@ struct dma_buf {
         struct file *file;
         struct list_head attachments;
         const struct dma_buf_ops *ops;
-        /* mutex to serialize list manipulation and attach/detach */
+        /* mutex to serialize list manipulation, attach/detach and vmap/unmap */
         struct mutex lock;
+        unsigned vmapping_counter;
+        void *vmap_ptr;
         void *priv;
 };