diff --git a/arch/s390/include/asm/hardirq.h b/arch/s390/include/asm/hardirq.h index a5b45388c91f..da3d5304a92d 100644 --- a/arch/s390/include/asm/hardirq.h +++ b/arch/s390/include/asm/hardirq.h @@ -16,6 +16,12 @@ #define local_softirq_pending() (get_lowcore()->softirq_pending) #define set_softirq_pending(x) (get_lowcore()->softirq_pending = (x)) #define or_softirq_pending(x) (get_lowcore()->softirq_pending |= (x)) +/* + * Not sure what the right thing is here for s390, + * but returning 0 will result in no logical change + * from what happens now + */ +#define __cpu_softirq_pending(x) (0) #define __ARCH_IRQ_STAT #define __ARCH_IRQ_EXIT_IRQS_DISABLED diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 457151f9f263..6cbb6cb136e9 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -534,6 +534,17 @@ DECLARE_STATIC_KEY_FALSE(force_irqthreads_key); #define set_softirq_pending(x) (__this_cpu_write(local_softirq_pending_ref, (x))) #define or_softirq_pending(x) (__this_cpu_or(local_softirq_pending_ref, (x))) +/** + * __cpu_softirq_pending() - Checks to see if softirq is pending on a cpu + * + * This helper is inherently racy, as we're accessing per-cpu data w/o locks. + * But peeking at the flag can still be useful when deciding where to place a + * task. + */ +static inline u32 __cpu_softirq_pending(int cpu) +{ + return (u32)per_cpu(local_softirq_pending_ref, cpu); +} #endif /* local_softirq_pending */ /* Some architectures might implement lazy enabling/disabling of