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-rw-r--r--Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl17
1 files changed, 1 insertions, 16 deletions
diff --git a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
index ab3dfe074fb1..05ae29ac898c 100644
--- a/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
+++ b/Documentation/sound/alsa/DocBook/writing-an-alsa-driver.tmpl
@@ -1433,25 +1433,10 @@
1433 <informalexample> 1433 <informalexample>
1434 <programlisting> 1434 <programlisting>
1435<![CDATA[ 1435<![CDATA[
1436 if (chip->res_port) { 1436 release_and_free_resource(chip->res_port);
1437 release_resource(chip->res_port);
1438 kfree_nocheck(chip->res_port);
1439 }
1440]]> 1437]]>
1441 </programlisting> 1438 </programlisting>
1442 </informalexample> 1439 </informalexample>
1443
1444 As you can see, the resource pointer is also to be freed
1445 via <function>kfree_nocheck()</function> after
1446 <function>release_resource()</function> is called. You
1447 cannot use <function>kfree()</function> here, because on ALSA,
1448 <function>kfree()</function> may be a wrapper to its own
1449 allocator with the memory debugging. Since the resource pointer
1450 is allocated externally outside the ALSA, it must be released
1451 via the native
1452 <function>kfree()</function>.
1453 <function>kfree_nocheck()</function> is used for that; it calls
1454 the native <function>kfree()</function> without wrapper.
1455 </para> 1440 </para>
1456 1441
1457 <para> 1442 <para>