diff options
Diffstat (limited to 'arch/arm64/include/asm/irq.h')
| -rw-r--r-- | arch/arm64/include/asm/irq.h | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/arch/arm64/include/asm/irq.h b/arch/arm64/include/asm/irq.h index 877c7e358384..3bece4379bd9 100644 --- a/arch/arm64/include/asm/irq.h +++ b/arch/arm64/include/asm/irq.h @@ -25,16 +25,13 @@ DECLARE_PER_CPU(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack); * ------------ * | | <- irq_stack_ptr * top ------------ - * | elr_el1 | + * | x19 | <- irq_stack_ptr - 0x08 * ------------ * | x29 | <- irq_stack_ptr - 0x10 * ------------ - * | xzr | - * ------------ - * | x19 | <- irq_stack_ptr - 0x20 - * ------------ * - * where x19 holds a copy of the task stack pointer. + * where x19 holds a copy of the task stack pointer where the struct pt_regs + * from kernel_entry can be found. * */ #define IRQ_STACK_PTR(cpu) ((unsigned long)per_cpu(irq_stack, cpu) + IRQ_STACK_START_SP) @@ -43,7 +40,7 @@ DECLARE_PER_CPU(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack); * The offset from irq_stack_ptr where entry.S will store the original * stack pointer. Used by unwind_frame() and dump_backtrace(). */ -#define IRQ_STACK_TO_TASK_STACK(ptr) *((unsigned long *)(ptr - 0x20)); +#define IRQ_STACK_TO_TASK_STACK(ptr) (*((unsigned long *)((ptr) - 0x08))) extern void set_handle_irq(void (*handle_irq)(struct pt_regs *)); |