linux-kernel - Re: [PATCH] acpi_i2c: set MODULE_LICENSE, MODULE_AUTHOR, and MODULE

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Message-ID: <3534926.AiYWyl8db9@vostro.rjw.lan>
Date:	Tue, 20 Aug 2013 14:38:50 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:	Jerry Snitselaar <jerry.snitselaar@...cle.com>,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH] acpi_i2c: set MODULE_LICENSE, MODULE_AUTHOR, and MODULE_DESCRIPTION

On Tuesday, August 20, 2013 11:18:52 AM Mika Westerberg wrote:
> On Tue, Aug 20, 2013 at 11:14:42AM +0300, Mika Westerberg wrote:
> > On Tue, Aug 20, 2013 at 01:00:08AM -0700, Jerry Snitselaar wrote:
> > > On Tue Aug 20 13, Mika Westerberg wrote:
> > > > On Mon, Aug 19, 2013 at 08:34:03PM -0700, Jerry Snitselaar wrote:
> > > > > On Tue Aug 20 13, Rafael J. Wysocki wrote:
> > > > > > On Monday, August 19, 2013 04:35:29 PM Jerry Snitselaar wrote:
> > > > > > > On Tue Aug 20 13, Rafael J. Wysocki wrote:
> > > > > > > > On Monday, August 19, 2013 09:16:14 AM Mika Westerberg wrote:
> > > > > > > > > On Fri, Aug 16, 2013 at 06:26:35PM -0700, Jerry Snitselaar wrote:
> > > > > > > > > > Without MODULE_LICENSE set, I get the following with modprobe:
> > > > > > > > > > 
> > > > > > > > > > acpi_i2c: module license 'unspecified' taints kernel.
> > > > > > > > > > acpi_i2c: Unknown symbol i2c_new_device (err 0)
> > > > > > > > > > acpi_i2c: Unknown symbol acpi_dev_get_resources (err 0)
> > > > > > > > > > acpi_i2c: Unknown symbol acpi_dev_resource_interrupt (err 0)
> > > > > > > > > > acpi_i2c: Unknown symbol acpi_dev_free_resource_list (err 0)
> > > > > > > > > > 
> > > > > > > > > > Signed-off-by: Jerry Snitselaar <jerry.snitselaar@...cle.com>
> > > > > > > > > 
> > > > > > > > > Looks good to me.
> > > > > > > > > 
> > > > > > > > > Acked-by: Mika Westerbeg <mika.westerberg@...ux.intel.com>
> > > > > > > > 
> > > > > > > > Well, OK, but do we need to be able to build that as a module?
> > > > > > > > 
> > > > > > > > Maybe it should just be yes or no?
> > > > > > > > 
> > > > > > > > Rafael
> > > > > > > > 
> > > > > > > 
> > > > > > > Perhaps have depends on I2C=y and be a bool instead of tristate?
> > > > > > 
> > > > > > Yes, that's the idea.
> > > > > > 
> > > > > Does this look okay Mika?
> > > > > 
> > > > > [PATCH] acpi_i2c: do not build as loadable module
> > > > > 
> > > > > Change from tristate to bool, and depend on I2C=y
> > > > 
> > > > I'm not sure about this. Does the below mean that we can't build the ACPI
> > > > I2C enumeration at all if I2C core is compiled as module?
> > > 
> > > Yes, that was what Rafael was suggesting. If the ability to compile as
> > > a module if I2C is a module is needed, then we need the 1st patch.
> > 
> > In that case I would prefer the first patch. Otherwise we lose the ability
> > to enumerate I2C devices from ACPI namespace on some distros (at least
> > Debian builds I2C core as a module).
> > 
> > Rafael?
> 
> Actually there's a patch that moves DT I2C helpers to the I2C core here:
> 
> https://lkml.org/lkml/2013/8/19/349
> 
> we should probably do the same for the ACPI case. Doing that solves this
> problem as well.

Yes, and I'd prefer it to be done this way.  Having ACPI support as a separate
module doesn't really buy us anything.

Thanks,
Rafael

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