297 	if (!test_and_set_bit(PG_HEADLOCK, &req->wb_flags))  in nfs_page_set_headlock()
300 	set_bit(PG_CONTENDED1, &req->wb_flags);  in nfs_page_set_headlock()
302 	return wait_on_bit_lock(&req->wb_flags, PG_HEADLOCK,  in nfs_page_set_headlock()
313 	clear_bit_unlock(PG_HEADLOCK, &req->wb_flags);  in nfs_page_clear_headlock()
315 	if (!test_bit(PG_CONTENDED1, &req->wb_flags))  in nfs_page_clear_headlock()
317 	wake_up_bit(&req->wb_flags, PG_HEADLOCK);  in nfs_page_clear_headlock()
363 	WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &head->wb_flags));  in nfs_page_group_sync_on_bit_locked()
364 	WARN_ON_ONCE(test_and_set_bit(bit, &req->wb_flags));  in nfs_page_group_sync_on_bit_locked()
368 		if (!test_bit(bit, &tmp->wb_flags))  in nfs_page_group_sync_on_bit_locked()
376 		clear_bit(bit, &tmp->wb_flags);  in nfs_page_group_sync_on_bit_locked()
419 		WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &prev->wb_head->wb_flags));  in nfs_page_group_init()
431 		if (test_bit(PG_INODE_REF, &prev->wb_head->wb_flags)) {  in nfs_page_group_init()
433 			set_bit(PG_INODE_REF, &req->wb_flags);  in nfs_page_group_init()
507 		set_bit(PG_FOLIO, &req->wb_flags);  in nfs_page_assign_folio()
618 	clear_bit_unlock(PG_BUSY, &req->wb_flags);  in nfs_unlock_request()
620 	if (!test_bit(PG_CONTENDED2, &req->wb_flags))  in nfs_unlock_request()
622 	wake_up_bit(&req->wb_flags, PG_BUSY);  in nfs_unlock_request()
652 		clear_bit(PG_FOLIO, &req->wb_flags);  in nfs_clear_request()
680 	WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags));  in nfs_free_request()
681 	WARN_ON_ONCE(test_bit(PG_UNLOCKPAGE, &req->wb_flags));  in nfs_free_request()
682 	WARN_ON_ONCE(test_bit(PG_UPTODATE, &req->wb_flags));  in nfs_free_request()
683 	WARN_ON_ONCE(test_bit(PG_WB_END, &req->wb_flags));  in nfs_free_request()
684 	WARN_ON_ONCE(test_bit(PG_REMOVE, &req->wb_flags));  in nfs_free_request()
707 	if (!test_bit(PG_BUSY, &req->wb_flags))  in nfs_wait_on_request()
709 	set_bit(PG_CONTENDED2, &req->wb_flags);  in nfs_wait_on_request()
711 	return wait_on_bit_io(&req->wb_flags, PG_BUSY,  in nfs_wait_on_request()