32  * 	int old = atomic_fetch_add_relaxed(r);
33  *	// old is INT_MAX, refcount now INT_MIN (0x8000_0000)
34  *	if (old < 0)
176 	int old = refcount_read(r);  in __refcount_add_not_zero()  local
179 		if (!old)  in __refcount_add_not_zero()
181 	} while (!atomic_try_cmpxchg_relaxed(&r->refs, &old, old + i));  in __refcount_add_not_zero()
184 		*oldp = old;  in __refcount_add_not_zero()
186 	if (unlikely(old < 0 || old + i < 0))  in __refcount_add_not_zero()
189 	return old;  in __refcount_add_not_zero()
219 	int old = refcount_read(r);  in __refcount_add_not_zero_limited_acquire()  local
222 		if (!old)  in __refcount_add_not_zero_limited_acquire()
225 		if (i > limit - old) {  in __refcount_add_not_zero_limited_acquire()
227 				*oldp = old;  in __refcount_add_not_zero_limited_acquire()
230 	} while (!atomic_try_cmpxchg_acquire(&r->refs, &old, old + i));  in __refcount_add_not_zero_limited_acquire()
233 		*oldp = old;  in __refcount_add_not_zero_limited_acquire()
235 	if (unlikely(old < 0 || old + i < 0))  in __refcount_add_not_zero_limited_acquire()
238 	return old;  in __refcount_add_not_zero_limited_acquire()
283 	int old = atomic_fetch_add_relaxed(i, &r->refs);  in __refcount_add()  local
286 		*oldp = old;  in __refcount_add()
288 	if (unlikely(!old))  in __refcount_add()
290 	else if (unlikely(old < 0 || old + i < 0))  in __refcount_add()
389 	int old = atomic_fetch_sub_release(i, &r->refs);  in __refcount_sub_and_test()  local
392 		*oldp = old;  in __refcount_sub_and_test()
394 	if (old > 0 && old == i) {  in __refcount_sub_and_test()
399 	if (unlikely(old <= 0 || old - i < 0))  in __refcount_sub_and_test()
455 	int old = atomic_fetch_sub_release(1, &r->refs);  in __refcount_dec()  local
458 		*oldp = old;  in __refcount_dec()
460 	if (unlikely(old <= 1))  in __refcount_dec()