1 files changed, 2 insertions, 0 deletions

diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
index fc910a622451..5a10d8d695b4 100644
--- a/include/media/videobuf2-core.h
+++ b/include/media/videobuf2-core.h
@@ -366,6 +366,7 @@ struct v4l2_fh;
  *              cannot be started unless at least this number of buffers
  *              have been queued into the driver.
  *
+ * @mmap_lock:  private mutex used when buffers are allocated/freed/mmapped
  * @memory:     current memory type used
  * @bufs:       videobuf buffer structures
  * @num_buffers: number of allocated/used buffers
@@ -399,6 +400,7 @@ struct vb2_queue {
         u32                             min_buffers_needed;
 
 /* private: internal use only */
+        struct mutex                    mmap_lock;
         enum v4l2_memory                memory;
         struct vb2_buffer               *bufs[VIDEO_MAX_FRAME];
         unsigned int                    num_buffers;