linux-kernel - Re: [RFC] Include ACPI DSDT from INITRD patch into mainline

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Date:	Fri, 01 Dec 2006 16:01:08 -0500
From:	Ben Collins <ben.collins@...ntu.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Alan <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	Eric Piel <eric.piel@...mplin-utc>
Subject: Re: [RFC] Include ACPI DSDT from INITRD patch into mainline

On Fri, 2006-12-01 at 20:45 +0100, Arjan van de Ven wrote:
> On Fri, 2006-12-01 at 14:35 -0500, Ben Collins wrote:
> > What about the point that userspace (udev, and such) is not available
> > when DSDT loading needs to occur? Init hasn't even started at that
> > point.
> 
> that's a moot point; you need to load firmware from the initramfs ANYWAY
> for things like qlogic and others...

I don't see how that relates. The DSDT needs to be loaded even before
driver initialization begins. Things like qlogic can over come this by
being compiled as modules, and letting initramfs-tools take care of
things.

That's not the case for DSDT loading. I'm not saying this patch is the
epitome of good coding, just that it's a needed feature.

If there's a better way to do it, I'm volunteering to do the grunt work,
but I haven't heard of any alternatives to this solution.
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