From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: Re: [PATCH RT] blk-mq: revert raw locks, post pone notifier to POST_DEAD
Date: Wed, 07 May 2014 10:19:42 +0200
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Cc: linux-rt-users@vger.kernel.org
To: Mike Galbraith <umgwanakikbuti@gmail.com>
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On 05/03/2014 07:03 PM, Mike Galbraith wrote:
>> Mike, I see that lockdep splat (sleeping while atomic) during cpu-hotplug.
>> Don't you see this, too?
> 
> Nope, didn't.

Hmm. blk_mq_hctx_notify(). It does
	spin_lock(&ctx->lock);

Isn't this a sleeping spinlock for you or don't get here at all?

Sebastian