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Date:   Tue, 4 Sep 2018 13:45:14 +0300
From:   Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:     Jaejoong Kim <climbbb.kim@...il.com>, linux-um@...ts.infradead.org,
        netdev@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-s390@...r.kernel.org, devel@...verdev.osuosl.org,
        greybus-dev@...ts.linaro.org, linuxppc-dev@...ts.ozlabs.org,
        linux-serial@...r.kernel.org, sparclinux@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jslaby@...e.com>
Subject: Re: [PATCH 01/25] tty: Change return type to void

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.kim@...il.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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