On Thu, Jul 21, 2016 at 2:21 PM, Josh Poimboeuf <jpoim...@redhat.com> wrote: > For reasons unknown, the x86_64 irq stack starts at an offset 64 bytes > from the end of the page. At least make that explicit.
This is a change in behavior -- see below. Please mention this in the changelog. > > FIXME: Can we just remove the 64 byte gap? If not, at least document > why. I have no clue. > > irq_stack_end = (unsigned long *)(per_cpu(irq_stack_ptr, cpu)); > - irq_stack = (unsigned long *)(per_cpu(irq_stack_ptr, cpu) - > IRQ_STACK_SIZE); > + irq_stack = (unsigned long *)(per_cpu(irq_stack_ptr, cpu) - > + IRQ_USABLE_STACK_SIZE); This is different.
