linux-kernel - Re: linux-next: Tree for Oct 31 (ehci, dbgp)

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Message-ID: <Pine.LNX.4.44L0.1211011636410.1762-100000@iolanthe.rowland.org>
Date:	Thu, 1 Nov 2012 16:39:09 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Jan Beulich <jbeulich@...e.com>
cc:	rdunlap@...radead.org, <sfr@...b.auug.org.au>,
	<linux-kernel@...r.kernel.org>, <linux-next@...r.kernel.org>,
	<linux-usb@...r.kernel.org>
Subject: Re: linux-next: Tree for Oct 31 (ehci, dbgp)

On Thu, 1 Nov 2012, Jan Beulich wrote:

> >>> Alan Stern <stern@...land.harvard.edu> 11/01/12 4:28 PM >>>
> >On Wed, 31 Oct 2012, Randy Dunlap wrote:
> >> on x86_64:
> >> 
> >> drivers/built-in.o: In function `ehci_reset':
> >> host.c:(.text+0x542a7e): undefined reference to `dbgp_reset_prep'
> >> host.c:(.text+0x542b75): undefined reference to `dbgp_external_startup'
> >> drivers/built-in.o: In function `ehci_bus_resume':
> >> host.c:(.text+0x544705): undefined reference to `dbgp_reset_prep'
> >> host.c:(.text+0x544731): undefined reference to `dbgp_external_startup'
> >
> >We all forgot about the chipidea driver.  It includes code from 
> 
> I didn't even know of this.
> 
> >ehci-hcd in a rather unorthodox manner (see 
> >drivers/usb/chipidea/host.c).
> >
> >Evidently we need to change your new test in
> >drivers/usb/early/ehci-dbgp.c to:
> >
> >#if IS_ENABLED(CONFIG_USB_HCD_EHCI) || defined(CONFIG_USB_CHIPIDEA_HOST)
> >
> >Upcoming changes to ehci-hcd will make this unnecessary in 3.8, but for 
> >now we need it.
> 
> Which tells me that the CONFIG_USB_SUPPORT version would have been
> the better one  (and I would favor that over the ugly variant you suggest
> above).

I also suggested IS_ENABLED(CONFIG_USB), which is no uglier than what 
you submitted and would also fix this build error.  How about using it 
instead?

Alan Stern

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