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Date: Thu, 2 Jul 2015 08:52:15 +0200
From: Joerg Roedel <jroedel@suse.de>
To: xiao jin <jin.xiao@intel.com>
Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, x86@kernel.org,
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        linux-kernel@vger.kernel.org, peterz@infradead.org, mingo@kernel.org,
        yanmin_zhang@linux.intel.com
Subject: Re: [PATCH] smpboot.c: move setup_vector_irq after set_cpu_online
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Hi Jin,

On Thu, Jul 02, 2015 at 12:24:34PM +0800, xiao jin wrote:
> [  106.107851] BUG: unable to handle kernel NULL pointer dereference at 0000000000000040
> [  106.116702] IP:
> [  106.118490]  [<ffffffff810044f6>] check_irq_vectors_for_cpu_disable+0x76/0x180

This might be the same issue I fixed with:

	d97eb8966c91 x86/irq: Check for valid irq descriptor in check_irq_vectors_for_cpu_disable()

Can you try whether applying this patch on your kernel fixes your
issue?


Thanks,

	Joerg

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