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Date:   Mon, 25 Apr 2022 13:39:38 +0200
From:   Heiko Carstens <hca@linux.ibm.com>
To:     Pingfan Liu <kernelfans@gmail.com>
Cc:     linux-s390@vger.kernel.org, Vasily Gorbik <gor@linux.ibm.com>,
        Alexander Gordeev <agordeev@linux.ibm.com>,
        Christian Borntraeger <borntraeger@linux.ibm.com>,
        Sven Schnelle <svens@linux.ibm.com>,
        Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCHv2] s390/irq: utilize RCU instead of irq_lock_sparse() in
 show_msi_interrupt()
Message-ID: <YmaIeqtLzPegsgZP@osiris>
References: <20220420140521.45361-5-kernelfans@gmail.com>
 <20220422100212.22666-1-kernelfans@gmail.com>
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On Fri, Apr 22, 2022 at 06:02:12PM +0800, Pingfan Liu wrote:
> As demonstrated by commit 74bdf7815dfb ("genirq: Speedup show_interrupts()"),
> irq_desc can be accessed safely in RCU read section.
> 
> Hence here resorting to rcu read lock to get rid of irq_lock_sparse().
> 
> Signed-off-by: Pingfan Liu <kernelfans@gmail.com>
> Cc: Heiko Carstens <hca@linux.ibm.com>
> Cc: Vasily Gorbik <gor@linux.ibm.com>
> Cc: Alexander Gordeev <agordeev@linux.ibm.com>
> Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
> Cc: Sven Schnelle <svens@linux.ibm.com>
> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
> Cc: linux-kernel@vger.kernel.org
> To: linux-s390@vger.kernel.org
> 
> ---
>  arch/s390/kernel/irq.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Applied, thanks!