linux-kernel - Re: [PATCH 0/5] staging: comedi: split bus support into separate modules

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Date:	Fri, 31 Oct 2014 22:08:45 +0000
From:	Ian Abbott <abbotti@....co.uk>
To:	Hartley Sweeten <HartleyS@...ionengravers.com>,
	"driverdev-devel@...uxdriverproject.org" 
	<driverdev-devel@...uxdriverproject.org>
CC:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/5] staging: comedi: split bus support into separate
 modules

On 31/10/14 18:19, Hartley Sweeten wrote:
> On Friday, October 31, 2014 10:48 AM, Ian Abbott wrote:
>> The Comedi core module doesn't need support for PCI, USB or PCMCIA.
>> Only the low-level Comedi drivers need it.  Split the support for these
>> bus types out of the core "comedi" module and into new modules,
>> "comedi_pci", "comedi_usb", and "comedi_pcmcia".
>>
>> 1) staging: comedi: comedidev.h: remove dummy PCI support functions
>> 2) staging: comedi: comedidev.h: remove some #ifdefs
>> 3) staging: comedi: split out PCMCIA support into new module
>> 4) staging: comedi: split out USB support into new module
>> 5) staging: comedi: split out PCI support into new module
>
> Ian,
>
> Is this really necessary?
>
> The pci, usb, and pcmcia support is already conditionally compiled in.
> The support does get added to the main comedi module instead of
> as separate modules but that shouldn't be a problem.

Well a lot of potentially unused module space could get pulled in if 
using a stock distro kernel. For example, the USB dependencies amount to 
over 200k. Not so bad for the others, especially PCI where the code is 
built in anyway.

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@....co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-
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