diff options
Diffstat (limited to 'kernel/drivers/irqchip/irq-gic.c')
| -rw-r--r-- | kernel/drivers/irqchip/irq-gic.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/drivers/irqchip/irq-gic.c b/kernel/drivers/irqchip/irq-gic.c index abf2ffaed..cebd8efe6 100644 --- a/kernel/drivers/irqchip/irq-gic.c +++ b/kernel/drivers/irqchip/irq-gic.c @@ -347,6 +347,14 @@ static void __exception_irq_entry gic_handle_irq(struct pt_regs *regs) if (static_key_true(&supports_deactivate)) writel_relaxed(irqstat, cpu_base + GIC_CPU_DEACTIVATE); #ifdef CONFIG_SMP + /* + * Ensure any shared data written by the CPU sending + * the IPI is read after we've read the ACK register + * on the GIC. + * + * Pairs with the write barrier in gic_raise_softirq + */ + smp_rmb(); handle_IPI(irqnr, regs); #endif continue; |