linux-kernel - Re: [PATCHv2] tty: Added a CONFIG_TTY option to allow removal of TTY

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Date:	Mon, 03 Sep 2012 23:15:58 +0200
From:	Jiri Slaby <jslaby@...e.cz>
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, team-fjord@...glegroups.com,
	Josh Triplett <josh@...htriplett.org>,
	"jirisl >> Jiri Slaby" <jirislaby@...il.com>
Subject: Re: [PATCHv2] tty: Added a CONFIG_TTY option to allow removal of
 TTY

On 09/03/2012 02:44 AM, Joe Millenbach wrote:
> The option allows you to remove TTY and compile without errors. This
> saves space on systems that won't support TTY interfaces anyway.
> bloat-o-meter output is below.
...
> --- a/drivers/tty/Kconfig
> +++ b/drivers/tty/Kconfig
> @@ -1,3 +1,14 @@
> +config TTY
> +	bool "Enable TTY" if EXPERT
> +	default y
> +	---help---
> +	  Allows you to remove TTY support which can save space, and
> +	  blocks features that require TTY from inclusion in the kernel.
> +	  TTY is required for any text terminals or serial port
> +	  communication. Most users should leave this enabled.
> +
> +if TTY
> +
>  config VT
>  	bool "Virtual terminal" if EXPERT
>  	depends on !S390 && !UML
> @@ -355,6 +366,8 @@ config TRACE_SINK
>  	  If you select this option, you need to select
>  	  "Trace data router for MIPI P1149.7 cJTAG standard".
>  
> +endif # TTY
> +
>  config PPC_EPAPR_HV_BYTECHAN
>  	tristate "ePAPR hypervisor byte channel driver"
>  	depends on PPC

Hmm, I wonder why do not you include EHV in the depends-on-tty list?

thanks,
-- 
js
suse labs
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