458 		spa_config_lock_t *scl = &spa->spa_config_lock[i];  in spa_config_lock_init()  local
459 		mutex_init(&scl->scl_lock, NULL, MUTEX_DEFAULT, NULL);  in spa_config_lock_init()
460 		cv_init(&scl->scl_cv, NULL, CV_DEFAULT, NULL);  in spa_config_lock_init()
461 		scl->scl_writer = NULL;  in spa_config_lock_init()
462 		scl->scl_write_wanted = 0;  in spa_config_lock_init()
463 		scl->scl_count = 0;  in spa_config_lock_init()
471 		spa_config_lock_t *scl = &spa->spa_config_lock[i];  in spa_config_lock_destroy()  local
472 		mutex_destroy(&scl->scl_lock);  in spa_config_lock_destroy()
473 		cv_destroy(&scl->scl_cv);  in spa_config_lock_destroy()
474 		ASSERT(scl->scl_writer == NULL);  in spa_config_lock_destroy()
475 		ASSERT(scl->scl_write_wanted == 0);  in spa_config_lock_destroy()
476 		ASSERT(scl->scl_count == 0);  in spa_config_lock_destroy()
484 		spa_config_lock_t *scl = &spa->spa_config_lock[i];  in spa_config_tryenter()  local
487 		mutex_enter(&scl->scl_lock);  in spa_config_tryenter()
489 			if (scl->scl_writer || scl->scl_write_wanted) {  in spa_config_tryenter()
490 				mutex_exit(&scl->scl_lock);  in spa_config_tryenter()
496 			ASSERT(scl->scl_writer != curthread);  in spa_config_tryenter()
497 			if (scl->scl_count != 0) {  in spa_config_tryenter()
498 				mutex_exit(&scl->scl_lock);  in spa_config_tryenter()
503 			scl->scl_writer = curthread;  in spa_config_tryenter()
505 		scl->scl_count++;  in spa_config_tryenter()
506 		mutex_exit(&scl->scl_lock);  in spa_config_tryenter()
521 		spa_config_lock_t *scl = &spa->spa_config_lock[i];  in spa_config_enter_impl()  local
522 		if (scl->scl_writer == curthread)  in spa_config_enter_impl()
526 		mutex_enter(&scl->scl_lock);  in spa_config_enter_impl()
528 			while (scl->scl_writer ||  in spa_config_enter_impl()
529 			    (!mmp_flag && scl->scl_write_wanted)) {  in spa_config_enter_impl()
530 				cv_wait(&scl->scl_cv, &scl->scl_lock);  in spa_config_enter_impl()
533 			ASSERT(scl->scl_writer != curthread);  in spa_config_enter_impl()
534 			while (scl->scl_count != 0) {  in spa_config_enter_impl()
535 				scl->scl_write_wanted++;  in spa_config_enter_impl()
536 				cv_wait(&scl->scl_cv, &scl->scl_lock);  in spa_config_enter_impl()
537 				scl->scl_write_wanted--;  in spa_config_enter_impl()
539 			scl->scl_writer = curthread;  in spa_config_enter_impl()
541 		scl->scl_count++;  in spa_config_enter_impl()
542 		mutex_exit(&scl->scl_lock);  in spa_config_enter_impl()
573 		spa_config_lock_t *scl = &spa->spa_config_lock[i];  in spa_config_exit()  local
576 		mutex_enter(&scl->scl_lock);  in spa_config_exit()
577 		ASSERT(scl->scl_count > 0);  in spa_config_exit()
578 		if (--scl->scl_count == 0) {  in spa_config_exit()
579 			ASSERT(scl->scl_writer == NULL ||  in spa_config_exit()
580 			    scl->scl_writer == curthread);  in spa_config_exit()
581 			scl->scl_writer = NULL;	/* OK in either case */  in spa_config_exit()
582 			cv_broadcast(&scl->scl_cv);  in spa_config_exit()
584 		mutex_exit(&scl->scl_lock);  in spa_config_exit()
594 		spa_config_lock_t *scl = &spa->spa_config_lock[i];  in spa_config_held()  local
597 		if ((rw == RW_READER && scl->scl_count != 0) ||  in spa_config_held()
598 		    (rw == RW_WRITER && scl->scl_writer == curthread))  in spa_config_held()