afs: add a file-level comment to afs_osidnlc.c

This file doesn't currently do a great job of telling the reader what
it's used for.  Let's give them a hint, especially for the expansion
of "DNLC".

Reviewed-on: https://gerrit.openafs.org/13557
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit 3a5ab19fe04058e002bfea90f8b64fab4676de67)

Change-Id: I41c53e5a37cc2da8fa0578a9c5db476530103981
Reviewed-on: https://gerrit.openafs.org/13650
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Cheyenne Wills <cwills@sinenomine.net>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>

diff --git a/src/afs/afs_osidnlc.c b/src/afs/afs_osidnlc.c
index 974eb4b85b5f0d55e77c03527b96b3ce5261d936..ab451dd30d478e9cfb3d2d749c73f21419562372 100644 (file)
--- a/src/afs/afs_osidnlc.c
+++ b/src/afs/afs_osidnlc.c
@@ -7,6 +7,13 @@
  * directory or online at http://www.openafs.org/dl/license10.html
  */
 
+/*-
+ * OSI Directory Name Lookup Cache
+ *
+ * Keep a local cache of lookup results to avoid needing to examine the disk
+ * cache, for frequently accessed names.
+ */
+
 #include <afsconfig.h>
 #include "afs/param.h"