netdev - Re: [RESEND PATCH net] tap: convert a mutex to a spinlock

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Message-Id: <20170711.134332.1783894537853836310.davem@davemloft.net>
Date:   Tue, 11 Jul 2017 13:43:32 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     xiyou.wangcong@...il.com
Cc:     netdev@...r.kernel.org, borntraeger@...ibm.com,
        eric.dumazet@...il.com, sainath.grandhi@...el.com
Subject: Re: [RESEND PATCH net] tap: convert a mutex to a spinlock

From: Cong Wang <xiyou.wangcong@...il.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@...ibm.com>
> Tested-by: Christian Borntraeger <borntraeger@...ibm.com>
> Cc: Sainath Grandhi <sainath.grandhi@...el.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>

Applied and queued up for -stable, thanks.