[PATCH 09/12] block: move blk_account_io_{start,done} to blk-mq.c

Christoph Hellwig
2021-10-25T07:05:55Z

These are only used for request based I/O, so move them where they are
used.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/blk-core.c | 27 +--------------------------
block/blk-mq.c | 42 ++++++++++++++++++++++++++++++++++++++++++
block/blk.h | 21 +--------------------
3 files changed, 44 insertions(+), 46 deletions(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index 98cb9d69a4068..5ca47d25a2ef2 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1088,8 +1088,7 @@ int iocb_bio_iopoll(struct kiocb *kiocb, struct io_comp_batch *iob,
}
EXPORT_SYMBOL_GPL(iocb_bio_iopoll);

-static void update_io_ticks(struct block_device *part, unsigned long now,
- bool end)
+void update_io_ticks(struct block_device *part, unsigned long now, bool end)
{
unsigned long stamp;
again:
@@ -1104,30 +1103,6 @@ static void update_io_ticks(struct block_device *part, unsigned long now,
}
}

-void __blk_account_io_done(struct request *req, u64 now)
-{
- const int sgrp = op_stat_group(req_op(req));
-
- part_stat_lock();
- update_io_ticks(req->part, jiffies, true);
- part_stat_inc(req->part, ios[sgrp]);
- part_stat_add(req->part, nsecs[sgrp], now - req->start_time_ns);
- part_stat_unlock();
-}
-
-void __blk_account_io_start(struct request *rq)
-{
- /* passthrough requests can hold bios that do not have ->bi_bdev set */
- if (rq->bio && rq->bio->bi_bdev)
- rq->part = rq->bio->bi_bdev;
- else
- rq->part = rq->rq_disk->part0;
-
- part_stat_lock();
- update_io_ticks(rq->part, jiffies, false);
- part_stat_unlock();
-}
-
static unsigned long __part_start_io_acct(struct block_device *part,
unsigned int sectors, unsigned int op)
{
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 06fb74166aded..7df80c4da3777 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -790,6 +790,48 @@ bool blk_update_request(struct request *req, blk_status_t error,
}
EXPORT_SYMBOL_GPL(blk_update_request);

+static void __blk_account_io_done(struct request *req, u64 now)
+{
+ const int sgrp = op_stat_group(req_op(req));
+
+ part_stat_lock();
+ update_io_ticks(req->part, jiffies, true);
+ part_stat_inc(req->part, ios[sgrp]);
+ part_stat_add(req->part, nsecs[sgrp], now - req->start_time_ns);
+ part_stat_unlock();
+}
+
+static inline void blk_account_io_done(struct request *req, u64 now)
+{
+ /*
+ * Account IO completion. flush_rq isn't accounted as a
+ * normal IO on queueing nor completion. Accounting the
+ * containing request is enough.
+ */
+ if (blk_do_io_stat(req) && req->part &&
+ !(req->rq_flags & RQF_FLUSH_SEQ))
+ __blk_account_io_done(req, now);
+}
+
+static void __blk_account_io_start(struct request *rq)
+{
+ /* passthrough requests can hold bios that do not have ->bi_bdev set */
+ if (rq->bio && rq->bio->bi_bdev)
+ rq->part = rq->bio->bi_bdev;
+ else
+ rq->part = rq->rq_disk->part0;
+
+ part_stat_lock();
+ update_io_ticks(rq->part, jiffies, false);
+ part_stat_unlock();
+}
+
+static inline void blk_account_io_start(struct request *req)
+{
+ if (blk_do_io_stat(req))
+ __blk_account_io_start(req);
+}
+
static inline void __blk_mq_end_request_acct(struct request *rq, u64 now)
{
if (rq->rq_flags & RQF_STATS) {
diff --git a/block/blk.h b/block/blk.h
index c5fc3f97d1e5a..8bcca0538faac 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -222,9 +222,6 @@ bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
bool blk_bio_list_merge(struct request_queue *q, struct list_head *list,
struct bio *bio, unsigned int nr_segs);

-void __blk_account_io_start(struct request *req);
-void __blk_account_io_done(struct request *req, u64 now);
-
/*
* Plug flush limits
*/
@@ -315,23 +312,7 @@ static inline bool blk_do_io_stat(struct request *rq)
return (rq->rq_flags & RQF_IO_STAT) && rq->rq_disk;
}

-static inline void blk_account_io_done(struct request *req, u64 now)
-{
- /*
- * Account IO completion. flush_rq isn't accounted as a
- * normal IO on queueing nor completion. Accounting the
- * containing request is enough.
- */
- if (blk_do_io_stat(req) && req->part &&
- !(req->rq_flags & RQF_FLUSH_SEQ))
- __blk_account_io_done(req, now);
-}
-
-static inline void blk_account_io_start(struct request *req)
-{
- if (blk_do_io_stat(req))
- __blk_account_io_start(req);
-}
+void update_io_ticks(struct block_device *part, unsigned long now, bool end);

static inline void req_set_nomerge(struct request_queue *q, struct request *req)
{
--
2.30.2