[PATCH] tmpfs readdir does not update dir atime

From: mark@borgerding.net

Access times of tmpfs dirs do not get updated on readdir.  This can cause
empty dirs to get tmpwatch'd too early, b/c atime never changes even though
the dir is in use.

fs/libfs.c

@@ -155,6 +155,7 @@ int dcache_readdir(struct file * filp, void * dirent, filldir_t filldir)
 			}
 			spin_unlock(&dcache_lock);
 	}
+	update_atime(dentry->d_inode);
 	return 0;
 }