Now, all pNMI can be detected before the dispatching of __el1_pnmi() or
__el1_interrupt(), and __el1_interrupt() will never be called in pNMI
context. As a result, the judgement of pNMI in
arm64_preempt_schedule_irq() becomes unnecessary.
Signed-off-by: Pingfan Liu <kernelfans@xxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Cc: Joey Gouly <joey.gouly@xxxxxxx>
Cc: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
Cc: Julien Thierry <julien.thierry@xxxxxxx>
Cc: Yuichi Ito <ito-yuichi@xxxxxxxxxxx>
Cc: rcu@xxxxxxxxxxxxxxx
To: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
---
arch/arm64/kernel/entry-common.c | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c
index afcde43f1b73..57d654b915a5 100644
--- a/arch/arm64/kernel/entry-common.c
+++ b/arch/arm64/kernel/entry-common.c
@@ -224,15 +224,6 @@ static void __sched arm64_preempt_schedule_irq(void)
{
lockdep_assert_irqs_disabled();
- /*
- * DAIF.DA are cleared at the start of IRQ/FIQ handling, and when GIC
- * priority masking is used the GIC irqchip driver will clear DAIF.IF
- * using gic_arch_enable_irqs() for normal IRQs. If anything is set in
- * DAIF we must have handled an NMI, so skip preemption.
- */
- if (system_uses_irq_prio_masking() && read_sysreg(daif))
- return;
-
/*
* Preempting a task from an IRQ means we leave copies of PSTATE
* on the stack. cpufeature's enable calls may modify PSTATE, but
--
2.31.1
