Re: [PATCHv2] s390/irq: utilize RCU instead of irq_lock_sparse() in show_msi_interrupt()

[Heiko Carstens]

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@xxxxxxxxx>
> Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
> Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
> Cc: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
> Cc: Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>
> Cc: Sven Schnelle <svens@xxxxxxxxxxxxx>
> Cc: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> To: linux-s390@xxxxxxxxxxxxxxx
> 
> ---
>  arch/s390/kernel/irq.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Applied, thanks!