linux-kernel - Re: [origin tree boot hang] [PATCH] Revert "early

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Date:	Wed, 23 Sep 2009 15:56:34 -0700 (PDT)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Jason Wessel <jason.wessel@...driver.com>
cc:	Ingo Molnar <mingo@...e.hu>, Len Brown <lenb@...nel.org>,
	Greg KH <gregkh@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [origin tree boot hang] [PATCH] Revert "early_printk:Allowmorethan
 one early console"



On Wed, 23 Sep 2009, Jason Wessel wrote:
> 
> Perhaps you will consider adding this patch to your tree?   It fixes the
> specific case you mentioned.  It will still allow the board to boot and
> instead of crashing, print a warning on the second instance.

Ugh. This looks totally bogus.

Why don't you just add CON_REGISTERED to the console flags, and do

	/* Already registered? */
	if (early_console->flags & CON_REGISTERED)
		return;
	early_console->flags |= CON_REGISTERED;

there instead? That whole "loop over existing consoles to check their 
names" looks silly and broken, and you're already playing with the flags 
in there (CON_BOOT).

		Linus
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