__PERCPU_REF_ATOMIC
__PERCPU_REF_ATOMIC_DEAD = __PERCPU_REF_ATOMIC | __PERCPU_REF_DEAD,
if (ref->percpu_count_ptr & __PERCPU_REF_ATOMIC) {
ref->percpu_count_ptr |= __PERCPU_REF_ATOMIC;
if (!(ref->percpu_count_ptr & __PERCPU_REF_ATOMIC))
ref->percpu_count_ptr & ~__PERCPU_REF_ATOMIC);
ref->percpu_count_ptr |= __PERCPU_REF_ATOMIC;