ocfs2: correct annotation from "l_next_rec" to "l_next_free_rec"

Correct annotation from "l_next_rec" to "l_next_free_rec"
Signed-off-by: Yan Wang <wangyan122@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jun Piao <piaojun@huawei.com>
Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Link: http://lkml.kernel.org/r/5e76c953-3479-1280-023c-ad05e4c75608@huawei.comSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/ocfs2/alloc.c

@@ -3941,7 +3941,7 @@ static void ocfs2_insert_at_leaf(struct ocfs2_extent_tree *et,
 	 * above.
 	 *
 	 * This leaf needs to have space, either by the empty 1st
-	 * extent record, or by virtue of an l_next_rec < l_count.
+	 * extent record, or by virtue of an l_next_free_rec < l_count.
 	 */
 	ocfs2_rotate_leaf(el, insert_rec);
 }