linux-kernel - Re: [Resend][2.6.27-git-a447c093244] BUG: spinlock bad magic on CPU#0, setserial/3527

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Message-ID: <20081014001657.13e40477@lxorguk.ukuu.org.uk>
Date:	Tue, 14 Oct 2008 00:16:57 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, Alan Cox <alan@...hat.com>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [Resend][2.6.27-git-a447c093244] BUG: spinlock bad magic on
 CPU#0, setserial/3527

On Mon, 13 Oct 2008 16:10:14 -0700 (PDT)
Linus Torvalds <torvalds@...ux-foundation.org> wrote:

> 
> If this started today, then the most likely culprit is Alan's series of 80 
> serial patches.
> 
> Alan? I can only assume it's one of the
> 
> 	spin_lock_irq(&up->port.lock);
> 
> in serial8250_startup() (or quite likely in one of the functions it calls 
> that get inlined by the compiler, like enable_rsa()).
> 
> And it sounds like it didn't get initialized.

Yeah I know whats going on I think. When I dropped out the NR_IRQ changes
I didn't drop back in the spin lock init. Will sort it tomorrow (actually
'later today' as its midnight here)

Alan
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