linux-kernel - Re: [PATCH] tty: Added a CONFIG_TTY option to allow removal of TTY

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Date:	Tue, 21 Aug 2012 14:20:47 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Joe Millenbach <jmillenbach@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Alan Cox <alan@...ux.intel.com>, linux-serial@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Josh Triplett <josh@...htriplett.org>,
	team-fjord@...glegroups.com
Subject: Re: [PATCH] tty: Added a CONFIG_TTY option to allow removal of TTY

> --- a/drivers/char/Kconfig
> +++ b/drivers/char/Kconfig
> @@ -53,7 +53,7 @@ source "drivers/tty/serial/Kconfig"
>  
>  config TTY_PRINTK
>  	bool "TTY driver to output user messages via printk"
> -	depends on EXPERT
> +	depends on EXPERT && TTY


A lot of these could be done better with an if I think - notably the
serial one and perhaps some of the input ones if the tty users were
bunched together.


>  config MOUSE_PS2
>  	tristate "PS/2 mouse"
> +	depends on TTY

It shouldn't. It would be good to understand why this occurs.


> diff --git a/include/linux/tty.h b/include/linux/tty.h
> index 5dbb3cb..c1406e3 100644
> --- a/include/linux/tty.h
> +++ b/include/linux/tty.h
> @@ -377,7 +377,12 @@ extern void tty_write_flush(struct tty_struct *);
>  
>  extern struct ktermios tty_std_termios;
>  
> +#ifdef CONFIG_TTY
>  extern void console_init(void);
> +#else
> +static inline void console_init(void)
> +{ }
> +#endif

Please can you bunch the whole lot up into one #if defined() / #else /
#endif

rather than lots.


Otherwise this looks very sensible to me.
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