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author | Jens Axboe <axboe@kernel.dk> | 2018-02-07 15:54:20 -0700 |
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committer | Jens Axboe <axboe@kernel.dk> | 2018-02-07 15:54:20 -0700 |
commit | 61a695184fcc8f225327206b88320279dd8684af (patch) | |
tree | 6cbda2b0e7de94ebad95072d17cc0aa82c9d8ab3 /Documentation/media/uapi/dvb/dmx-munmap.rst | |
parent | 9e05c864993c5442227f83ae1694a737d7a102ed (diff) | |
parent | 581e400ff935d34d95811258586128bf11baef15 (diff) |
Merge branch 'master' into test
* master: (1190 commits)
ASoC: stm32: add of dependency for stm32 drivers
ASoC: mt8173-rt5650: fix child-node lookup
ASoC: dapm: fix debugfs read using path->connected
platform/x86: samsung-laptop: Re-use DEFINE_SHOW_ATTRIBUTE() macro
platform/x86: ideapad-laptop: Re-use DEFINE_SHOW_ATTRIBUTE() macro
platform/x86: dell-laptop: Re-use DEFINE_SHOW_ATTRIBUTE() macro
seq_file: Introduce DEFINE_SHOW_ATTRIBUTE() helper macro
Documentation/sysctl/user.txt: fix typo
MAINTAINERS: update ARM/QUALCOMM SUPPORT patterns
MAINTAINERS: update various PALM patterns
MAINTAINERS: update "ARM/OXNAS platform support" patterns
MAINTAINERS: update Cortina/Gemini patterns
MAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern
MAINTAINERS: remove ANDROID ION pattern
mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
mm: docs: fix parameter names mismatch
mm: docs: fixup punctuation
pipe: read buffer limits atomically
pipe: simplify round_pipe_size()
pipe: reject F_SETPIPE_SZ with size over UINT_MAX
...
Diffstat (limited to 'Documentation/media/uapi/dvb/dmx-munmap.rst')
-rw-r--r-- | Documentation/media/uapi/dvb/dmx-munmap.rst | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Documentation/media/uapi/dvb/dmx-munmap.rst b/Documentation/media/uapi/dvb/dmx-munmap.rst new file mode 100644 index 000000000000..d77218732bb6 --- /dev/null +++ b/Documentation/media/uapi/dvb/dmx-munmap.rst @@ -0,0 +1,54 @@ +.. _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. |