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| author | Mikulas Patocka <mpatocka@redhat.com> | 2018-12-06 11:41:21 -0500 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-12-10 08:30:38 -0700 |
| commit | e016b78201a2d9ff40f3f0da072292689af24c7f (patch) | |
| tree | c81a404bcfe431857279e2f18c4a20e38191609c /block/genhd.c | |
| parent | 1226b8dd0e91331cfab500f305b2c264445a0392 (diff) | |
| download | lwn-e016b78201a2d9ff40f3f0da072292689af24c7f.tar.gz lwn-e016b78201a2d9ff40f3f0da072292689af24c7f.zip | |
block: return just one value from part_in_flight
The previous patches deleted all the code that needed the second value
returned from part_in_flight - now the kernel only uses the first value.
Consequently, part_in_flight (and blk_mq_in_flight) may be changed so that
it only returns one value.
This patch just refactors the code, there's no functional change.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/genhd.c')
| -rw-r--r-- | block/genhd.c | 34 |
1 files changed, 12 insertions, 22 deletions
diff --git a/block/genhd.c b/block/genhd.c index 9827a2c05db7..1dd8fd6613b8 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -65,34 +65,24 @@ void part_dec_in_flight(struct request_queue *q, struct hd_struct *part, int rw) part_stat_local_dec(&part_to_disk(part)->part0, in_flight[rw]); } -void part_in_flight(struct request_queue *q, struct hd_struct *part, - unsigned int inflight[2]) +unsigned int part_in_flight(struct request_queue *q, struct hd_struct *part) { int cpu; + unsigned int inflight; if (queue_is_mq(q)) { - blk_mq_in_flight(q, part, inflight); - return; + return blk_mq_in_flight(q, part); } - inflight[0] = 0; + inflight = 0; for_each_possible_cpu(cpu) { - inflight[0] += part_stat_local_read_cpu(part, in_flight[0], cpu) + - part_stat_local_read_cpu(part, in_flight[1], cpu); + inflight += part_stat_local_read_cpu(part, in_flight[0], cpu) + + part_stat_local_read_cpu(part, in_flight[1], cpu); } - if ((int)inflight[0] < 0) - inflight[0] = 0; + if ((int)inflight < 0) + inflight = 0; - if (part->partno) { - part = &part_to_disk(part)->part0; - inflight[1] = 0; - for_each_possible_cpu(cpu) { - inflight[1] += part_stat_local_read_cpu(part, in_flight[0], cpu) + - part_stat_local_read_cpu(part, in_flight[1], cpu); - } - if ((int)inflight[1] < 0) - inflight[1] = 0; - } + return inflight; } void part_in_flight_rw(struct request_queue *q, struct hd_struct *part, @@ -1348,7 +1338,7 @@ static int diskstats_show(struct seq_file *seqf, void *v) struct disk_part_iter piter; struct hd_struct *hd; char buf[BDEVNAME_SIZE]; - unsigned int inflight[2]; + unsigned int inflight; /* if (&disk_to_dev(gp)->kobj.entry == block_class.devices.next) @@ -1360,7 +1350,7 @@ static int diskstats_show(struct seq_file *seqf, void *v) disk_part_iter_init(&piter, gp, DISK_PITER_INCL_EMPTY_PART0); while ((hd = disk_part_iter_next(&piter))) { - part_in_flight(gp->queue, hd, inflight); + inflight = part_in_flight(gp->queue, hd); seq_printf(seqf, "%4d %7d %s " "%lu %lu %lu %u " "%lu %lu %lu %u " @@ -1376,7 +1366,7 @@ static int diskstats_show(struct seq_file *seqf, void *v) part_stat_read(hd, merges[STAT_WRITE]), part_stat_read(hd, sectors[STAT_WRITE]), (unsigned int)part_stat_read_msecs(hd, STAT_WRITE), - inflight[0], + inflight, jiffies_to_msecs(part_stat_read(hd, io_ticks)), jiffies_to_msecs(part_stat_read(hd, time_in_queue)), part_stat_read(hd, ios[STAT_DISCARD]), |