diff options
Diffstat (limited to 'Documentation/media/uapi/v4l/func-mmap.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/func-mmap.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/media/uapi/v4l/func-mmap.rst b/Documentation/media/uapi/v4l/func-mmap.rst index c156fb7b7422..639fef5b4f78 100644 --- a/Documentation/media/uapi/v4l/func-mmap.rst +++ b/Documentation/media/uapi/v4l/func-mmap.rst @@ -78,7 +78,9 @@ Arguments ``MAP_SHARED`` allows applications to share the mapped memory with other (e. g. child-) processes. - .. note:: The Linux ``videobuf`` module which is used by some + .. note:: + + The Linux ``videobuf`` module which is used by some drivers supports only ``MAP_SHARED``. ``MAP_PRIVATE`` requests copy-on-write semantics. V4L2 applications should not set the ``MAP_PRIVATE``, ``MAP_DENYWRITE``, ``MAP_EXECUTABLE`` or ``MAP_ANON`` |