f2fs: fix last_lblock check in check_swap_activate_fast

Because page_no < sis->max guarantees that the while loop break out
normally, the wrong check contidion here doesn't cause a problem.
Signed-off-by: Huang Jianan <huangjianan@oppo.com>
Signed-off-by: Guo Weichao <guoweichao@oppo.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/data.c

@@ -3803,7 +3803,7 @@ static int check_swap_activate_fast(struct swap_info_struct *sis,
 	last_lblock = bytes_to_blks(inode, i_size_read(inode));
 	len = i_size_read(inode);
 
-	while (cur_lblock <= last_lblock && cur_lblock < sis->max) {
+	while (cur_lblock < last_lblock && cur_lblock < sis->max) {
 		struct f2fs_map_blocks map;
 		pgoff_t next_pgofs;