Hello!

On 9/4/2018 5:44 AM, Jaejoong Kim wrote:

Many drivers with tty use the tty_stand_install(). But, there is no
need to handle the error, since it always returns 0. So, change the
return type of tty_standard_install() and tty_port_install() to void
type and remove unnecessary exception handling where we use these
functions.

Signed-off-by: Jaejoong Kim <climbbb....@gmail.com>
---
  drivers/tty/tty_io.c   | 10 ++++++----
  drivers/tty/tty_port.c |  4 ++--
  include/linux/tty.h    |  4 ++--
  3 files changed, 10 insertions(+), 8 deletions(-)

[...]
diff --git a/include/linux/tty.h b/include/linux/tty.h
index c56e397..63cdac1 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -556,7 +556,7 @@ extern struct tty_struct *tty_init_dev(struct tty_driver 
*driver, int idx);
  extern void tty_release_struct(struct tty_struct *tty, int idx);
  extern int tty_release(struct inode *inode, struct file *filp);
  extern void tty_init_termios(struct tty_struct *tty);
-extern int tty_standard_install(struct tty_driver *driver,
+extern void tty_standard_install(struct tty_driver *driver,
                struct tty_struct *tty);
extern struct mutex tty_mutex;
@@ -688,7 +688,7 @@ extern int tty_port_close_start(struct tty_port *port,
  extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
  extern void tty_port_close(struct tty_port *port,
                                struct tty_struct *tty, struct file *filp);
-extern int tty_port_install(struct tty_port *port, struct tty_driver *driver,
+extern void tty_port_install(struct tty_port *port, struct tty_driver *driver,
                                struct tty_struct *tty);

You need to update all the callers in the same patch -- the kernel must remain buildable after each patch but you seem to have spread that update among a lot of patches..

[...]

MBR, Sergei

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