diff options
Diffstat (limited to 'arch/arm/kernel/irq.c')
| -rw-r--r-- | arch/arm/kernel/irq.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index b79975bd988c..abb0aa679bba 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -43,6 +43,25 @@ unsigned long irq_err_count; +#ifdef CONFIG_IRQSTACKS + +asmlinkage DEFINE_PER_CPU_READ_MOSTLY(u8 *, irq_stack_ptr); + +static void __init init_irq_stacks(void) +{ + u8 *stack; + int cpu; + + for_each_possible_cpu(cpu) { + stack = (u8 *)__get_free_pages(GFP_KERNEL, THREAD_SIZE_ORDER); + if (WARN_ON(!stack)) + break; + per_cpu(irq_stack_ptr, cpu) = &stack[THREAD_SIZE]; + } +} + +#endif + int arch_show_interrupts(struct seq_file *p, int prec) { #ifdef CONFIG_FIQ @@ -101,6 +120,10 @@ void __init init_IRQ(void) { int ret; +#ifdef CONFIG_IRQSTACKS + init_irq_stacks(); +#endif + if (IS_ENABLED(CONFIG_OF) && !machine_desc->init_irq) irqchip_init(); else |