Fix a comment when ext2_release_file() is called.

Signed-off-by: Jan Kara <jack@suse.cz>

diff -rupX /home/jack/.kerndiffexclude linux-2.6.21/fs/ext2/file.c linux-2.6.21-1-ext2_comment_fix/fs/ext2/file.c
--- linux-2.6.21/fs/ext2/file.c	2007-05-15 14:18:47.000000000 +0200
+++ linux-2.6.21-1-ext2_comment_fix/fs/ext2/file.c	2007-05-29 12:15:59.000000000 +0200
@@ -24,9 +24,9 @@
 #include "acl.h"
 
 /*
- * Called when an inode is released. Note that this is different
- * from ext2_open_file: open gets called at every open, but release
- * gets called only when /all/ the files are closed.
+ * Called when filp is released. This happens when all file descriptors
+ * for a single struct file are closed. Note that different open() calls
+ * for the same file yield different struct file structures.
  */
 static int ext2_release_file (struct inode * inode, struct file * filp)
 {