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authorJens Axboe <axboe@kernel.dk>2017-08-09 02:51:45 +0300
committerJens Axboe <axboe@kernel.dk>2017-08-09 22:09:28 +0300
commitf299b7c7a9dee64425e5965bd4f56dc024c1befc (patch)
treed81520896fad3b9d3e87c19d538ec00c052d1b7c /include/linux/genhd.h
parent0609e0efc5e15195ecf8c6d2f2e890d98760e337 (diff)
downloadlinux-f299b7c7a9dee64425e5965bd4f56dc024c1befc.tar.xz
blk-mq: provide internal in-flight variant
We don't have to inc/dec some counter, since we can just iterate the tags. That makes inc/dec a noop, but means we have to iterate busy tags to get an in-flight count. Reviewed-by: Bart Van Assche <bart.vanassche@wdc.com> Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/genhd.h')
-rw-r--r--include/linux/genhd.h35
1 files changed, 6 insertions, 29 deletions
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index f2a3a26cdda1..ea652bfcd675 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -362,35 +362,12 @@ static inline void free_part_stats(struct hd_struct *part)
#define part_stat_sub(cpu, gendiskp, field, subnd) \
part_stat_add(cpu, gendiskp, field, -subnd)
-static inline void part_inc_in_flight(struct request_queue *q,
- struct hd_struct *part, int rw)
-{
- atomic_inc(&part->in_flight[rw]);
- if (part->partno)
- atomic_inc(&part_to_disk(part)->part0.in_flight[rw]);
-}
-
-static inline void part_dec_in_flight(struct request_queue *q,
- struct hd_struct *part, int rw)
-{
- atomic_dec(&part->in_flight[rw]);
- if (part->partno)
- atomic_dec(&part_to_disk(part)->part0.in_flight[rw]);
-}
-
-static inline void part_in_flight(struct request_queue *q,
- struct hd_struct *part,
- unsigned int inflight[2])
-{
- inflight[0] = atomic_read(&part->in_flight[0]) +
- atomic_read(&part->in_flight[1]);
- if (part->partno) {
- part = &part_to_disk(part)->part0;
- inflight[1] = atomic_read(&part->in_flight[0]) +
- atomic_read(&part->in_flight[1]);
- } else
- inflight[1] = 0;
-}
+void part_in_flight(struct request_queue *q, struct hd_struct *part,
+ unsigned int inflight[2]);
+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);
static inline struct partition_meta_info *alloc_part_info(struct gendisk *disk)
{