linux-kernel - Re: [PATCH v4 11/14] platform/x86: dell-smbios-wmi: Add new WMI dispatcher driver

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Date:   Fri, 6 Oct 2017 09:44:40 -0700
From:   Darren Hart <dvhart@...radead.org>
To:     Mario.Limonciello@...l.com
Cc:     andy.shevchenko@...il.com, linux-kernel@...r.kernel.org,
        platform-driver-x86@...r.kernel.org, luto@...nel.org,
        quasisec@...gle.com, pali.rohar@...il.com, rjw@...ysocki.net,
        mjg59@...gle.com, hch@....de, greg@...ah.com
Subject: Re: [PATCH v4 11/14] platform/x86: dell-smbios-wmi: Add new WMI
 dispatcher driver

On Thu, Oct 05, 2017 at 07:47:38PM +0000, Mario.Limonciello@...l.com wrote:
> > -----Original Message-----
> > From: Darren Hart [mailto:dvhart@...radead.org]
> > Sent: Thursday, October 5, 2017 12:58 PM
> > To: Limonciello, Mario <Mario_Limonciello@...l.com>
> > Cc: andy.shevchenko@...il.com; linux-kernel@...r.kernel.org; platform-
> > driver-x86@...r.kernel.org; luto@...nel.org; quasisec@...gle.com;
> > pali.rohar@...il.com; rjw@...ysocki.net; mjg59@...gle.com; hch@....de;
> > greg@...ah.com
> > Subject: Re: [PATCH v4 11/14] platform/x86: dell-smbios-wmi: Add new WMI
> > dispatcher driver
> > 
> > On Thu, Oct 05, 2017 at 03:12:46PM +0000, Mario.Limonciello@...l.com wrote:
> > 
> > > > > diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
> > > > > index f0b97cb8e449..ef597f440d2e 100644
> > > > > --- a/drivers/platform/x86/Kconfig
> > > > > +++ b/drivers/platform/x86/Kconfig
> > > > > @@ -93,13 +93,27 @@ config ASUS_LAPTOP
> > > > >
> > > > >  config DELL_SMBIOS
> > > > >  	tristate "Dell SMBIOS calling interface"
> > > > > -	depends on DELL_SMBIOS_SMM
> > > > > +	depends on DELL_SMBIOS_WMI || DELL_SMBIOS_SMM
> > > > >  	---help---
> > > > >  	This module provides common functions for kernel modules using
> > > > >  	Dell SMBIOS.
> > > >
> > > > You use select DELL_SMBIOS below, which implies this modules should be
> > > > invisible. Indeed, there is no need for the user to see the DELL_SMBIOS
> > > > option at all now, they can select DELL_SMBIOS_WMI and or
> > > > DELL_SMBIOS_SMM, no need to keep the DELL_SMBIOS option.
> > > >
> > > So when you say make invisible, does that mean that it should never show
> > > up in make menuconfig and just be implicitly selected?
> > 
> > Right. It shouldn't have a prompt.
> > 
> > >
> > > When I was adjusting Kconfig for your other feedback I noticed setting
> > something
> > > to "select $DRIVER" that invisible driver does show up just can't be turned off.
> > > Is that what you mean?
> > 
> > No, I mean eliminate the menu entry by eliminating the prompt.
> Do you have an example of a driver that does it this way? 
> When I tried, CONFIG_DELL_WMI_DESCRIPTOR doesn't get saved to .config
> and then doesn't compile into a module anymore.

Just eliminating the prompt will hide DELL_SMBIOS from menuconfig:

config DELL_SMBIOS
	tristate
	depends on DELL_SMBIOS_WMI || DELL_SMBIOS_SMM

-- 
Darren Hart
VMware Open Source Technology Center