linux-kernel - Re: [mmc] alternative TI FM MMC/SD driver for 2.6.21-rc7

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Message-ID: <462DBA5C.3090003@gmail.com>
Date:	Tue, 24 Apr 2007 11:05:48 +0300
From:	Sergey Yanovich <ynvich@...il.com>
To:	Alex Dubov <oakad@...oo.com>
CC:	linux-kernel@...r.kernel.org
Subject: Re: [mmc] alternative TI FM MMC/SD driver for 2.6.21-rc7

Hi,
>> If you add support for let's say [tifm_8xx2] in the future, which
>> would have port offsets different that [tifm_7xx1], you would also need a
>> completely new modules for slots (sd, ms, etc).
>>
>
> Does not this constitutes an unbounded speculation?
Only time will tell :)
> And then, what would you propose to do with
> adapters that have SD support disabled? There are quite a few of those in the wild, as of right
> now (SD support is provided by bundled SDHCI on such systems, if at all). Similar argument goes
> for other media types as well - many controllers have xD support disabled too (I think you have
> one of those - Sony really values its customers). After all, it is not healthy to have dead code
> in the kernel.
>
A typical kernel config is an allmconfig, which has tones of dead
code: just see a 'General setup' part of your distro '.config'.
There are item like 'SMP' selected by default for 686+ CPUs. And
this is far more overhead that a single check of card type on
insert.

To allow customization, boolean module options that disable certain
card type may suffice.

And again, you are doing a great work with the driver.

--
Sergey Yanovich
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