===================================================================
@@ -475,14 +475,7 @@ get_temporary_buffer(5, (int*)0);
descriptor, and provides the <code>fd()</code> function.
</para></listitem>
</itemizedlist>
- <para>If you want to access a <code>filebuf</code>'s file descriptor to
- implement file locking (e.g. using the <code>fcntl()</code> system
- call) then you might be interested in Henry Suter's RWLock class.
- <!-- url="http://suter.home.cern.ch/suter/RWLock.html" -->
- </para>
- <para>
- </para>
</section>
</chapter>
PR libstdc++/51701 * doc/xml/manual/extensions.xml (Input and Output): Remove reference to RWLock class. Committed to trunk.