linux-kernel - Re: [PATCH] [ARM] Unconditional call to smp_cross

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Message-ID: <20120523185248.GA6908@n2100.arm.linux.org.uk>
Date:	Wed, 23 May 2012 19:52:48 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Pantelis Antoniou <panto@...oniou-consulting.com>
Cc:	linux-kernel@...r.kernel.org, Russ.Dill@...com, mporter@...com
Subject: Re: [PATCH] [ARM] Unconditional call to smp_cross_call on UP
	crashes

On Thu, May 24, 2012 at 05:09:59PM +0000, Pantelis Antoniou wrote:
> omap2plus_defconfig builds with SMP & SMP_ON_UP set.
> On beagle (which is UP) is_smp() returns false and we don't call
> smp_init_cpus which in turn does not initialize smp_cross_call which
> remains NULL.
> 
> When issuing a reboot we OOPS with a NULL dereference on stop smp_call.
> 
> Fixed by checking is_smp in smp_send_stop()

1. No sign-off, so this patch _can't_ be committed.

2. Poor description.  You say it oopses, but you don't include the oops.
So, when I read this I've no idea exactly why this is failing.  And it
_shouldn't_ fail, so I want to know what you are seeing.
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