linux-kernel - Re: [Linaro-acpi] [RFC 3/5] acpi/serial: add DBG2 earlycon support

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Message-ID: <1441734807.5459.18.camel@redhat.com>
Date:	Tue, 08 Sep 2015 13:53:27 -0400
From:	Mark Salter <msalter@...hat.com>
To:	Leif Lindholm <leif.lindholm@...aro.org>
Cc:	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-serial@...r.kernel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linaro-acpi@...ts.linaro.org,
	jcm@...hat.com, torez@...hat.com, lv.zheng@...el.com
Subject: Re: [Linaro-acpi] [RFC 3/5] acpi/serial: add DBG2 earlycon support

On Tue, 2015-09-08 at 18:17 +0100, Leif Lindholm wrote:
> > >      */
> > > -   if (!buf || !buf[0])
> > > -           if (IS_ENABLED(CONFIG_OF_FLATTREE))
> > > +   if (!buf || !buf[0]) {
> > > +           if (!acpi_disabled)
> > 
> > How do we know for sure that "acpi" has been parsed before "earlycon"?
> 
> Because "arch" comes before "drivers" in kernel image link order.
> *twitch*
> Yes, not the best argument ever.
> 

I don't think that matters. Things are parsed in order they are
found on cmdline (except for early vs late distinction).

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