On 2022-09-07 22:25:05 [-0400], guoren@xxxxxxxxxx wrote: > --- a/arch/riscv/kernel/irq.c > +++ b/arch/riscv/kernel/irq.c > @@ -11,6 +11,7 @@ > #include <linux/seq_file.h> > #include <asm/smp.h> > #include <asm/vmap_stack.h> > +#include <asm/softirq_stack.h> > > #ifdef CONFIG_IRQ_STACKS > static DEFINE_PER_CPU(ulong *, irq_stack_ptr); > @@ -38,6 +39,21 @@ static void init_irq_stacks(void) > per_cpu(irq_stack_ptr, cpu) = per_cpu(irq_stack, cpu); > } > #endif /* CONFIG_VMAP_STACK */ > + > +#ifndef CONFIG_PREEMPT_RT Could you please replace it with #ifdef CONFIG_SOFTIRQ_ON_OWN_STACK instead? See https://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic.git/commit/?id=8cbb2b50ee2dcb082675237eaaa48fe8479f8aa5 > +static void do_riscv_softirq(struct pt_regs *regs) > +{ > + __do_softirq(); > +} > + > +void do_softirq_own_stack(void) > +{ > + ulong *sp = per_cpu(irq_stack_ptr, smp_processor_id()); > + > + call_on_stack(NULL, sp, do_riscv_softirq, 0); > +} > +#endif /* CONFIG_PREEMPT_RT */ > + > #else > static void init_irq_stacks(void) {} > #endif /* CONFIG_IRQ_STACKS */ Sebastian
