From: David Woodhouse <dwmw2@infradead.org>
To: Andi Kleen <ak@suse.de>
Cc: Dave Hansen <haveblue@us.ibm.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] early printk for x86
Date: Mon, 18 Nov 2002 15:39:12 +0000 [thread overview]
Message-ID: <16835.1037633952@passion.cambridge.redhat.com> (raw)
In-Reply-To: <20021118161750.A32042@wotan.suse.de>
ak@suse.de said:
> The generic serial driver needs lots of infrastructure that is not
> present in early boot. Also the early_printk serial driver is polled,
> not interrupt driven.
No, the generic serial _console_ is polled and should require no more
infrastructure than the early_console version which it strongly resembles.
After all, it's generally called from console_init(), at which point
there's little more infrastructure available than in setup_arch() _anyway_.
You should happily be able to call serial8250_console_init() earlier then
console_init() currently does.
(Btw, if you're playing with this code I posted a cleanup to all the
horrible #ifdefs in console_init, converting it to the __initcall mechanism.
http://marc.theaimsgroup.com/?l=linux-kernel&m=103660078206270&w=2 )
--
dwmw2
next prev parent reply other threads:[~2002-11-18 15:32 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-11-14 19:42 [PATCH] early printk for x86 Dave Hansen
2002-11-14 19:55 ` Andi Kleen
2002-11-14 20:27 ` Jeff Garzik
2002-11-14 22:50 ` Dave Hansen
2002-11-15 3:43 ` Andi Kleen
2002-11-15 3:52 ` William Lee Irwin III
2002-11-15 4:15 ` H. Peter Anvin
2002-11-14 21:05 ` Jeff Garzik
2002-11-14 23:17 ` Jeff Garzik
2002-11-18 15:15 ` David Woodhouse
2002-11-18 15:17 ` Andi Kleen
2002-11-18 15:39 ` David Woodhouse [this message]
[not found] <3DD3FCB3.40506@us.ibm.com.suse.lists.linux.kernel>
[not found] ` <3DD40719.5030108@pobox.com.suse.lists.linux.kernel>
[not found] ` <3DD428C3.4030700@us.ibm.com.suse.lists.linux.kernel>
[not found] ` <20021115044300.C20764@wotan.suse.de.suse.lists.linux.kernel>
[not found] ` <ar1sdm$gfe$1@cesium.transmeta.com.suse.lists.linux.kernel>
2002-11-15 4:31 ` Andi Kleen
2002-11-15 4:33 ` H. Peter Anvin
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