258 	if (!test_and_set_bit(PG_HEADLOCK, &req->wb_flags))  in nfs_page_set_headlock()
261 	set_bit(PG_CONTENDED1, &req->wb_flags);  in nfs_page_set_headlock()
263 	return wait_on_bit_lock(&req->wb_flags, PG_HEADLOCK,  in nfs_page_set_headlock()
275 	clear_bit(PG_HEADLOCK, &req->wb_flags);  in nfs_page_clear_headlock()
277 	if (!test_bit(PG_CONTENDED1, &req->wb_flags))  in nfs_page_clear_headlock()
279 	wake_up_bit(&req->wb_flags, PG_HEADLOCK);  in nfs_page_clear_headlock()
325 	WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &head->wb_flags));  in nfs_page_group_sync_on_bit_locked()
326 	WARN_ON_ONCE(test_and_set_bit(bit, &req->wb_flags));  in nfs_page_group_sync_on_bit_locked()
330 		if (!test_bit(bit, &tmp->wb_flags))  in nfs_page_group_sync_on_bit_locked()
338 		clear_bit(bit, &tmp->wb_flags);  in nfs_page_group_sync_on_bit_locked()
381 		WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &prev->wb_head->wb_flags));  in nfs_page_group_init()
393 		if (test_bit(PG_INODE_REF, &prev->wb_head->wb_flags)) {  in nfs_page_group_init()
395 			set_bit(PG_INODE_REF, &req->wb_flags);  in nfs_page_group_init()
533 	clear_bit(PG_BUSY, &req->wb_flags);  in nfs_unlock_request()
535 	if (!test_bit(PG_CONTENDED2, &req->wb_flags))  in nfs_unlock_request()
537 	wake_up_bit(&req->wb_flags, PG_BUSY);  in nfs_unlock_request()
590 	WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags));  in nfs_free_request()
591 	WARN_ON_ONCE(test_bit(PG_UNLOCKPAGE, &req->wb_flags));  in nfs_free_request()
592 	WARN_ON_ONCE(test_bit(PG_UPTODATE, &req->wb_flags));  in nfs_free_request()
593 	WARN_ON_ONCE(test_bit(PG_WB_END, &req->wb_flags));  in nfs_free_request()
594 	WARN_ON_ONCE(test_bit(PG_REMOVE, &req->wb_flags));  in nfs_free_request()
617 	if (!test_bit(PG_BUSY, &req->wb_flags))  in nfs_wait_on_request()
619 	set_bit(PG_CONTENDED2, &req->wb_flags);  in nfs_wait_on_request()
621 	return wait_on_bit_io(&req->wb_flags, PG_BUSY,  in nfs_wait_on_request()