DEPOT_STACK_ALIGN
#define DEPOT_OFFSET_BITS (DEPOT_POOL_ORDER + PAGE_SHIFT - DEPOT_STACK_ALIGN)
stack->handle.offset = pool_offset >> DEPOT_STACK_ALIGN;
return ALIGN(sizeof(struct stack_record) - unused, 1 << DEPOT_STACK_ALIGN);
size_t offset = parts.offset << DEPOT_STACK_ALIGN;