media: docs: move uAPI book to userspace-api/media

[linux-block.git] / Documentation / media / uapi / dvb / dmx-munmap.rst

diff --git a/Documentation/media/uapi/dvb/dmx-munmap.rst b/Documentation/media/uapi/dvb/dmx-munmap.rst
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-.. Permission is granted to copy, distribute and/or modify this
-.. document under the terms of the GNU Free Documentation License,
-.. Version 1.1 or any later version published by the Free Software
-.. Foundation, with no Invariant Sections, no Front-Cover Texts
-.. and no Back-Cover Texts. A copy of the license is included at
-.. Documentation/media/uapi/fdl-appendix.rst.
-..
-.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections
-
-.. _dmx-munmap:
-
-************
-DVB munmap()
-************
-
-Name
-====
-
-dmx-munmap - Unmap device memory
-
-.. warning:: This API is still experimental.
-
-
-Synopsis
-========
-
-.. code-block:: c
-
-    #include <unistd.h>
-    #include <sys/mman.h>
-
-
-.. c:function:: int munmap( void *start, size_t length )
-    :name: dmx-munmap
-
-Arguments
-=========
-
-``start``
-    Address of the mapped buffer as returned by the
-    :ref:`mmap() <dmx-mmap>` function.
-
-``length``
-    Length of the mapped buffer. This must be the same value as given to
-    :ref:`mmap() <dmx-mmap>`.
-
-
-Description
-===========
-
-Unmaps a previously with the :ref:`mmap() <dmx-mmap>` function mapped
-buffer and frees it, if possible.
-
-
-Return Value
-============
-
-On success :ref:`munmap() <dmx-munmap>` returns 0, on failure -1 and the
-``errno`` variable is set appropriately:
-
-EINVAL
-    The ``start`` or ``length`` is incorrect, or no buffers have been
-    mapped yet.