linux-kernel - Re: [PATCH 1/1] mmc: add MODALIAS linkage for MMC/SD devices

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Message-ID: <ac3eb2510901250800g40dd31d8q35e626413f2853a1@mail.gmail.com>
Date:	Sun, 25 Jan 2009 17:00:11 +0100
From:	Kay Sievers <kay.sievers@...y.org>
To:	Pierre Ossman <drzeus-mmc@...eus.cx>
Cc:	Andy Whitcroft <apw@...onical.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] mmc: add MODALIAS linkage for MMC/SD devices

On Sun, Jan 25, 2009 at 16:48, Pierre Ossman <drzeus-mmc@...eus.cx> wrote:
> On Sun, 25 Jan 2009 00:45:46 +0100
> Kay Sievers <kay.sievers@...y.org> wrote:
>
>> On Sat, Jan 24, 2009 at 18:56, Pierre Ossman <drzeus-mmc@...eus.cx> wrote:
>> >
>> > Well, as long as we're on the track of temporary hack, we might as well
>> > just export "mmc_block" as the modalias. Or would there be any
>> > side-effects to that?
>>
>> The common format is to prefix with "<subsystem>:". Something like
>> "mmc:block" sounds fine to me.
>>
>
> My point was to have the kernel explicitly ask for the module it wants
> as there is no decent device to driver mapping scheme.

Yep, which is what we do not want. Aliases are "aliases", and not
"module names". We need to add a matching alias to the module then.
Direct module names can not properly defined/blacklisted in userspace,
and we would need to work around that.
Every modalias should be
"<subsystem>:<whatever-name-fits-for-the-subsystem>" to plug properly
into the autoloading infrastructure. We rather have no modalias at
all, then a kernel module name there.

Thanks,
Kay
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