138 	rq->part = NULL;  in blk_rq_init()
1405 static void part_round_stats_single(int cpu, struct hd_struct *part,  in part_round_stats_single()  argument
1410 	if (now == part->stamp)  in part_round_stats_single()
1413 	inflight = part_in_flight(part);  in part_round_stats_single()
1415 		__part_stat_add(cpu, part, time_in_queue,  in part_round_stats_single()
1416 				inflight * (now - part->stamp));  in part_round_stats_single()
1417 		__part_stat_add(cpu, part, io_ticks, (now - part->stamp));  in part_round_stats_single()
1419 	part->stamp = now;  in part_round_stats_single()
1438 void part_round_stats(int cpu, struct hd_struct *part)  in part_round_stats()  argument
1442 	if (part->partno)  in part_round_stats()
1443 		part_round_stats_single(cpu, &part_to_disk(part)->part0, now);  in part_round_stats()
1444 	part_round_stats_single(cpu, part, now);  in part_round_stats()
1858 static bool should_fail_request(struct hd_struct *part, unsigned int bytes)  in should_fail_request()  argument
1860 	return part->make_it_fail && should_fail(&fail_make_request, bytes);  in should_fail_request()
1875 static inline bool should_fail_request(struct hd_struct *part,  in should_fail_request()  argument
1919 	struct hd_struct *part;  in generic_make_request_checks()  local
1936 	part = bio->bi_bdev->bd_part;  in generic_make_request_checks()
1937 	if (should_fail_request(part, bio->bi_iter.bi_size) ||  in generic_make_request_checks()
1938 	    should_fail_request(&part_to_disk(part)->part0,  in generic_make_request_checks()
2268 		struct hd_struct *part;  in blk_account_io_completion()  local
2272 		part = req->part;  in blk_account_io_completion()
2273 		part_stat_add(cpu, part, sectors[rw], bytes >> 9);  in blk_account_io_completion()
2288 		struct hd_struct *part;  in blk_account_io_done()  local
2292 		part = req->part;  in blk_account_io_done()
2294 		part_stat_inc(cpu, part, ios[rw]);  in blk_account_io_done()
2295 		part_stat_add(cpu, part, ticks[rw], duration);  in blk_account_io_done()
2296 		part_round_stats(cpu, part);  in blk_account_io_done()
2297 		part_dec_in_flight(part, rw);  in blk_account_io_done()
2299 		hd_struct_put(part);  in blk_account_io_done()
2328 	struct hd_struct *part;  in blk_account_io_start()  local
2338 		part = rq->part;  in blk_account_io_start()
2339 		part_stat_inc(cpu, part, merges[rw]);  in blk_account_io_start()
2341 		part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq));  in blk_account_io_start()
2342 		if (!hd_struct_try_get(part)) {  in blk_account_io_start()
2351 			part = &rq->rq_disk->part0;  in blk_account_io_start()
2352 			hd_struct_get(part);  in blk_account_io_start()
2354 		part_round_stats(cpu, part);  in blk_account_io_start()
2355 		part_inc_in_flight(part, rw);  in blk_account_io_start()
2356 		rq->part = part;  in blk_account_io_start()