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Diffstat (limited to 'Documentation/media/uapi/v4l/func-munmap.rst')
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diff --git a/Documentation/media/uapi/v4l/func-munmap.rst b/Documentation/media/uapi/v4l/func-munmap.rst deleted file mode 100644 index 0d472d86a036..000000000000 --- a/Documentation/media/uapi/v4l/func-munmap.rst +++ /dev/null @@ -1,65 +0,0 @@ -.. 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 - -.. _func-munmap: - -************* -V4L2 munmap() -************* - -Name -==== - -v4l2-munmap - Unmap device memory - - -Synopsis -======== - -.. code-block:: c - - #include <unistd.h> - #include <sys/mman.h> - - -.. c:function:: int munmap( void *start, size_t length ) - :name: v4l2-munmap - -Arguments -========= - -``start`` - Address of the mapped buffer as returned by the - :ref:`mmap() <func-mmap>` function. - -``length`` - Length of the mapped buffer. This must be the same value as given to - :ref:`mmap() <func-mmap>` and returned by the driver in the struct - :c:type:`v4l2_buffer` ``length`` field for the - single-planar API and in the struct - :c:type:`v4l2_plane` ``length`` field for the - multi-planar API. - - -Description -=========== - -Unmaps a previously with the :ref:`mmap() <func-mmap>` function mapped -buffer and frees it, if possible. - - -Return Value -============ - -On success :ref:`munmap() <func-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. |