4 files changed, 8 insertions, 6 deletions
diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c
index 8bbce6a4d7f5..99361618c31f 100644
--- a/drivers/s390/char/con3215.c
+++ b/drivers/s390/char/con3215.c
@@ -1021,7 +1021,8 @@ static unsigned int tty3215_write_room(struct tty_struct *tty)
 /*
  * String write routine for 3215 ttys
  */
-static int tty3215_write(struct tty_struct *tty, const u8 *buf, int count)
+static ssize_t tty3215_write(struct tty_struct *tty, const u8 *buf,
+			     size_t count)
 {
 	handle_write(tty->driver_data, buf, count);
 	return count;
diff --git a/drivers/s390/char/con3270.c b/drivers/s390/char/con3270.c
index 6374555a0937..363315fa1666 100644
--- a/drivers/s390/char/con3270.c
+++ b/drivers/s390/char/con3270.c
@@ -1803,7 +1803,8 @@ static void tty3270_do_write(struct tty3270 *tp, struct tty_struct *tty,
 /*
  * String write routine for 3270 ttys
  */
-static int tty3270_write(struct tty_struct *tty, const u8 *buf, int count)
+static ssize_t tty3270_write(struct tty_struct *tty, const u8 *buf,
+			     size_t count)
 {
 	struct tty3270 *tp;
 
diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c
index 831a8c7cacc2..892c18d2f87e 100644
--- a/drivers/s390/char/sclp_tty.c
+++ b/drivers/s390/char/sclp_tty.c
@@ -229,8 +229,8 @@ out:
  * tty device. The characters may come from user space or kernel space. This
  * routine will return the number of characters actually accepted for writing.
  */
-static int
-sclp_tty_write(struct tty_struct *tty, const u8 *buf, int count)
+static ssize_t
+sclp_tty_write(struct tty_struct *tty, const u8 *buf, size_t count)
 {
 	if (sclp_tty_chars_count > 0) {
 		sclp_tty_write_string(sclp_tty_chars, sclp_tty_chars_count, 0);
diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c
index e148350c1e2c..218ae604f737 100644
--- a/drivers/s390/char/sclp_vt220.c
+++ b/drivers/s390/char/sclp_vt220.c
@@ -462,8 +462,8 @@ out:
  * user space or kernel space.  This routine will return the
  * number of characters actually accepted for writing.
  */
-static int
-sclp_vt220_write(struct tty_struct *tty, const u8 *buf, int count)
+static ssize_t
+sclp_vt220_write(struct tty_struct *tty, const u8 *buf, size_t count)
 {
 	return __sclp_vt220_write(buf, count, 1, 0, 1);
 }