188 	struct test_abba *abba = container_of(work, typeof(*abba), work);  in test_abba_work()  local
193 	if (!abba->trylock)  in test_abba_work()
194 		ww_mutex_lock(&abba->b_mutex, &ctx);  in test_abba_work()
196 		WARN_ON(!ww_mutex_trylock(&abba->b_mutex, &ctx));  in test_abba_work()
198 	WARN_ON(READ_ONCE(abba->b_mutex.ctx) != &ctx);  in test_abba_work()
200 	complete(&abba->b_ready);  in test_abba_work()
201 	wait_for_completion(&abba->a_ready);  in test_abba_work()
203 	err = ww_mutex_lock(&abba->a_mutex, &ctx);  in test_abba_work()
204 	if (abba->resolve && err == -EDEADLK) {  in test_abba_work()
205 		ww_mutex_unlock(&abba->b_mutex);  in test_abba_work()
206 		ww_mutex_lock_slow(&abba->a_mutex, &ctx);  in test_abba_work()
207 		err = ww_mutex_lock(&abba->b_mutex, &ctx);  in test_abba_work()
211 		ww_mutex_unlock(&abba->a_mutex);  in test_abba_work()
212 	ww_mutex_unlock(&abba->b_mutex);  in test_abba_work()
215 	abba->result = err;  in test_abba_work()
220 	struct test_abba abba;  in test_abba()  local
224 	ww_mutex_init(&abba.a_mutex, &ww_class);  in test_abba()
225 	ww_mutex_init(&abba.b_mutex, &ww_class);  in test_abba()
226 	INIT_WORK_ONSTACK(&abba.work, test_abba_work);  in test_abba()
227 	init_completion(&abba.a_ready);  in test_abba()
228 	init_completion(&abba.b_ready);  in test_abba()
229 	abba.trylock = trylock;  in test_abba()
230 	abba.resolve = resolve;  in test_abba()
232 	schedule_work(&abba.work);  in test_abba()
236 		ww_mutex_lock(&abba.a_mutex, &ctx);  in test_abba()
238 		WARN_ON(!ww_mutex_trylock(&abba.a_mutex, &ctx));  in test_abba()
240 	WARN_ON(READ_ONCE(abba.a_mutex.ctx) != &ctx);  in test_abba()
242 	complete(&abba.a_ready);  in test_abba()
243 	wait_for_completion(&abba.b_ready);  in test_abba()
245 	err = ww_mutex_lock(&abba.b_mutex, &ctx);  in test_abba()
247 		ww_mutex_unlock(&abba.a_mutex);  in test_abba()
248 		ww_mutex_lock_slow(&abba.b_mutex, &ctx);  in test_abba()
249 		err = ww_mutex_lock(&abba.a_mutex, &ctx);  in test_abba()
253 		ww_mutex_unlock(&abba.b_mutex);  in test_abba()
254 	ww_mutex_unlock(&abba.a_mutex);  in test_abba()
257 	flush_work(&abba.work);  in test_abba()
258 	destroy_work_on_stack(&abba.work);  in test_abba()
262 		if (err || abba.result) {  in test_abba()
264 			       __func__, err, abba.result);  in test_abba()
268 		if (err != -EDEADLK && abba.result != -EDEADLK) {  in test_abba()
270 			       __func__, err, abba.result);  in test_abba()