150 	if (!test_and_set_bit(PG_HEADLOCK, &head->wb_flags))  in nfs_page_group_lock()
153 	set_bit(PG_CONTENDED1, &head->wb_flags);  in nfs_page_group_lock()
155 	return wait_on_bit_lock(&head->wb_flags, PG_HEADLOCK,  in nfs_page_group_lock()
171 	clear_bit(PG_HEADLOCK, &head->wb_flags);  in nfs_page_group_unlock()
173 	if (!test_bit(PG_CONTENDED1, &head->wb_flags))  in nfs_page_group_unlock()
175 	wake_up_bit(&head->wb_flags, PG_HEADLOCK);  in nfs_page_group_unlock()
189 	WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &head->wb_flags));  in nfs_page_group_sync_on_bit_locked()
190 	WARN_ON_ONCE(test_and_set_bit(bit, &req->wb_flags));  in nfs_page_group_sync_on_bit_locked()
194 		if (!test_bit(bit, &tmp->wb_flags))  in nfs_page_group_sync_on_bit_locked()
202 		clear_bit(bit, &tmp->wb_flags);  in nfs_page_group_sync_on_bit_locked()
245 		WARN_ON_ONCE(!test_bit(PG_HEADLOCK, &prev->wb_head->wb_flags));  in nfs_page_group_init()
257 		if (test_bit(PG_INODE_REF, &prev->wb_head->wb_flags)) {  in nfs_page_group_init()
259 			set_bit(PG_INODE_REF, &req->wb_flags);  in nfs_page_group_init()
362 	clear_bit(PG_BUSY, &req->wb_flags);  in nfs_unlock_request()
364 	if (!test_bit(PG_CONTENDED2, &req->wb_flags))  in nfs_unlock_request()
366 	wake_up_bit(&req->wb_flags, PG_BUSY);  in nfs_unlock_request()
422 	WARN_ON_ONCE(test_bit(PG_TEARDOWN, &req->wb_flags));  in nfs_free_request()
423 	WARN_ON_ONCE(test_bit(PG_UNLOCKPAGE, &req->wb_flags));  in nfs_free_request()
424 	WARN_ON_ONCE(test_bit(PG_UPTODATE, &req->wb_flags));  in nfs_free_request()
425 	WARN_ON_ONCE(test_bit(PG_WB_END, &req->wb_flags));  in nfs_free_request()
426 	WARN_ON_ONCE(test_bit(PG_REMOVE, &req->wb_flags));  in nfs_free_request()
449 	if (!test_bit(PG_BUSY, &req->wb_flags))  in nfs_wait_on_request()
451 	set_bit(PG_CONTENDED2, &req->wb_flags);  in nfs_wait_on_request()
453 	return wait_on_bit_io(&req->wb_flags, PG_BUSY,  in nfs_wait_on_request()