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Re: [PATCH] xen/evtchn: Change irq_info lock to raw_spinlock_t
- To: Luca Fancellu <luca.fancellu@xxxxxxx>, sstabellini@xxxxxxxxxx, jgross@xxxxxxxx, jgrall@xxxxxxxxxx
- From: Julien Grall <julien@xxxxxxx>
- Date: Tue, 6 Apr 2021 14:46:31 +0100
- Cc: boris.ostrovsky@xxxxxxxxxx, tglx@xxxxxxxxxxxxx, wei.liu@xxxxxxxxxx, jbeulich@xxxxxxxx, yyankovskyi@xxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, stable@xxxxxxxxxxxxxxx, bertrand.marquis@xxxxxxx
- Delivery-date: Tue, 06 Apr 2021 13:46:37 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hi Luca,
On 06/04/2021 11:51, Luca Fancellu wrote:
Unmask operation must be called with interrupt disabled,
on preempt_rt spin_lock_irqsave/spin_unlock_irqrestore
don't disable/enable interrupts, so use raw_* implementation
and change lock variable in struct irq_info from spinlock_t
to raw_spinlock_t
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 25da4618af24 ("xen/events: don't unmask an event channel
when an eoi is pending")
Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
Reviewed-by: Julien Grall <jgrall@xxxxxxxxxx>
Cheers,
--
Julien Grall
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