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-rw-r--r--Documentation/DocBook/v4l/func-munmap.xml3
1 files changed, 2 insertions, 1 deletions
diff --git a/Documentation/DocBook/v4l/func-munmap.xml b/Documentation/DocBook/v4l/func-munmap.xml
index 502ed49323b0..e2c4190f9bb6 100644
--- a/Documentation/DocBook/v4l/func-munmap.xml
+++ b/Documentation/DocBook/v4l/func-munmap.xml
@@ -37,7 +37,8 @@
<para>Length of the mapped buffer. This must be the same
value as given to <function>mmap()</function> and returned by the
driver in the &v4l2-buffer; <structfield>length</structfield>
-field.</para>
+field for the single-planar API and in the &v4l2-plane;
+<structfield>length</structfield> field for the multi-planar API.</para>
</listitem>
</varlistentry>
</variablelist>