Documentation/filesystems/proc.txt typo fix.

Typo fix for a filename in procfs documentation.

Signed-off-by: Rob Landley <rob@landley.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
diff --git a/Documentation/filesystems/proc.txt b/Documentation/filesystems/proc.txt
index a4f30fa..7707003 100644
--- a/Documentation/filesystems/proc.txt
+++ b/Documentation/filesystems/proc.txt
@@ -305,7 +305,7 @@
   cgtime        guest time of the task children in jiffies
 ..............................................................................
 
-The /proc/PID/map file containing the currently mapped memory regions and
+The /proc/PID/maps file containing the currently mapped memory regions and
 their access permissions.
 
 The format is: