linux-kernel - Re: [patch] blkcg: change a spin_lock() to spin_lock

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Date:	Thu, 29 Mar 2012 20:57:31 +0200
From:	Jens Axboe <axboe@...nel.dk>
To:	Dan Carpenter <dan.carpenter@...cle.com>
CC:	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch] blkcg: change a spin_lock() to spin_lock_irq()

On 2012-03-29 20:51, Dan Carpenter wrote:
> Smatch complains that we re-enable IRQs twice.  It looks like we forgot
> to disable them here on the spin_trylock() failure path.  This was added
> in 9f13ef678e "blkcg: use double locking instead of RCU for blkg
> synchronization".

Thanks, that is indeed a screwup. Fix applied.

-- 
Jens Axboe

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