From: Andy Lutomirski <[email protected]> stack_overflow_check() is using both irq_stack_ptr and irq_stack_union to find the IRQ stack. That's going to break when vmapped irq stacks are introduced.
Change it to just use irq_stack_ptr. Signed-off-by: Andy Lutomirski <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> --- arch/x86/kernel/irq_64.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) --- a/arch/x86/kernel/irq_64.c +++ b/arch/x86/kernel/irq_64.c @@ -55,9 +55,8 @@ static inline void stack_overflow_check( regs->sp <= curbase + THREAD_SIZE) return; - irq_stack_top = (u64)this_cpu_ptr(irq_stack_union.irq_stack) + - STACK_TOP_MARGIN; irq_stack_bottom = (u64)__this_cpu_read(irq_stack_ptr); + irq_stack_top = irq_stack_bottom - IRQ_STACK_SIZE + STACK_TOP_MARGIN; if (regs->sp >= irq_stack_top && regs->sp <= irq_stack_bottom) return;
