use iov_iter_ubuf() instead of iov_iter_init() to simplify the code

Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com>
---
 fs/seq_file.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/seq_file.c b/fs/seq_file.c
index 9456a2032224..6af66161576a 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -150,13 +150,12 @@ static int traverse(struct seq_file *m, loff_t offset)
  */
 ssize_t seq_read(struct file *file, char __user *buf, size_t size, loff_t *ppos)
 {
-	struct iovec iov = { .iov_base = buf, .iov_len = size};
 	struct kiocb kiocb;
 	struct iov_iter iter;
 	ssize_t ret;
 
 	init_sync_kiocb(&kiocb, file);
-	iov_iter_init(&iter, READ, &iov, 1, size);
+	iov_iter_ubuf(&iter, READ, buf, size);
 
 	kiocb.ki_pos = *ppos;
 	ret = seq_read_iter(&kiocb, &iter);
-- 
2.17.1