block: merge part_{inc,dev}_in_flight into their only callers

part_inc_in_flight and part_dec_in_flight only have one caller each, and
those callers are purely for bio based drivers.  Merge each function into
the only caller, and remove the superflous blk-mq checks.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/bio.c

@@ -1396,13 +1396,16 @@ void generic_start_io_acct(struct request_queue *q, int op,
 			   unsigned long sectors, struct hd_struct *part)
 {
 	const int sgrp = op_stat_group(op);
+	int rw = op_is_write(op);
 
 	part_stat_lock();
 
 	update_io_ticks(part, jiffies, false);
 	part_stat_inc(part, ios[sgrp]);
 	part_stat_add(part, sectors[sgrp], sectors);
-	part_inc_in_flight(q, part, op_is_write(op));
+	part_stat_local_inc(part, in_flight[rw]);
+	if (part->partno)
+		part_stat_local_inc(&part_to_disk(part)->part0, in_flight[rw]);
 
 	part_stat_unlock();
 }
@@ -1414,12 +1417,15 @@ void generic_end_io_acct(struct request_queue *q, int req_op,
 	unsigned long now = jiffies;
 	unsigned long duration = now - start_time;
 	const int sgrp = op_stat_group(req_op);
+	int rw = op_is_write(req_op);
 
 	part_stat_lock();
 
 	update_io_ticks(part, now, true);
 	part_stat_add(part, nsecs[sgrp], jiffies_to_nsecs(duration));
-	part_dec_in_flight(q, part, op_is_write(req_op));
+	part_stat_local_dec(part, in_flight[rw]);
+	if (part->partno)
+		part_stat_local_dec(&part_to_disk(part)->part0, in_flight[rw]);
 
 	part_stat_unlock();
 }

block/blk.h

@@ -345,10 +345,6 @@ void blk_queue_free_zone_bitmaps(struct request_queue *q);
 static inline void blk_queue_free_zone_bitmaps(struct request_queue *q) {}
 #endif
 
-void part_dec_in_flight(struct request_queue *q, struct hd_struct *part,
-			int rw);
-void part_inc_in_flight(struct request_queue *q, struct hd_struct *part,
-			int rw);
 void update_io_ticks(struct hd_struct *part, unsigned long now, bool end);
 struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector);
 

block/genhd.c

@@ -119,26 +119,6 @@ static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat)
 }
 #endif /* CONFIG_SMP */
 
-void part_inc_in_flight(struct request_queue *q, struct hd_struct *part, int rw)
-{
-	if (queue_is_mq(q))
-		return;
-
-	part_stat_local_inc(part, in_flight[rw]);
-	if (part->partno)
-		part_stat_local_inc(&part_to_disk(part)->part0, in_flight[rw]);
-}
-
-void part_dec_in_flight(struct request_queue *q, struct hd_struct *part, int rw)
-{
-	if (queue_is_mq(q))
-		return;
-
-	part_stat_local_dec(part, in_flight[rw]);
-	if (part->partno)
-		part_stat_local_dec(&part_to_disk(part)->part0, in_flight[rw]);
-}
-
 static unsigned int part_in_flight(struct request_queue *q,
 		struct hd_struct *part)
 {