From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [RESEND PATCH net] tap: convert a mutex to a spinlock
Date: Tue, 11 Jul 2017 13:43:32 -0700 (PDT)
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Cc: netdev@vger.kernel.org, borntraeger@de.ibm.com,
        eric.dumazet@gmail.com, sainath.grandhi@intel.com
To: xiyou.wangcong@gmail.com
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From: Cong Wang <xiyou.wangcong@gmail.com>
Date: Mon, 10 Jul 2017 10:05:50 -0700

> We are not allowed to block on the RCU reader side, so can't
> just hold the mutex as before. As a quick fix, convert it to
> a spinlock.
> 
> Fixes: d9f1f61c0801 ("tap: Extending tap device create/destroy APIs")
> Reported-by: Christian Borntraeger <borntraeger@de.ibm.com>
> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
> Cc: Sainath Grandhi <sainath.grandhi@intel.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>

Applied and queued up for -stable, thanks.