STACK_DEPOT_FLAG_CAN_ALLOC
bool can_alloc = (depot_flags & STACK_DEPOT_FLAG_CAN_ALLOC) && allow_spin;
STACK_DEPOT_FLAG_CAN_ALLOC);
stack = kasan_save_stack(flags, STACK_DEPOT_FLAG_CAN_ALLOC);
STACK_DEPOT_FLAG_CAN_ALLOC | STACK_DEPOT_FLAG_GET);