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cfq-iosched: separate out cfqg_stats_reset() from cfq_pd_reset_stats()

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Separate out cfqg_stats_reset() which takes struct cfqg_stats * from
cfq_pd_reset_stats() and move the latter to where other pd methods are
defined.  cfqg_stats_reset() will be used to implement hierarchical
stats.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Vivek Goyal <vgoyal@redhat.com>
This commit is contained in:
Tejun Heo 2013-01-09 08:05:13 -08:00
parent 810ecfa765
commit 689665af44
1 changed files with 9 additions and 4 deletions
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13
block/cfq-iosched.c
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@ -688,11 +688,9 @@ static inline void cfqg_stats_update_completion(struct cfq_group *cfqg,
io_start_time - start_time);
}
static void cfq_pd_reset_stats(struct blkcg_gq *blkg)
/* @stats = 0 */
static void cfqg_stats_reset(struct cfqg_stats *stats)
{
struct cfq_group *cfqg = blkg_to_cfqg(blkg);
struct cfqg_stats *stats = &cfqg->stats;
/* queued stats shouldn't be cleared */
blkg_rwstat_reset(&stats->service_bytes);
blkg_rwstat_reset(&stats->serviced);
@ -1477,6 +1475,13 @@ static void cfq_pd_init(struct blkcg_gq *blkg)
cfqg->leaf_weight = blkg->blkcg->cfq_leaf_weight;
}
static void cfq_pd_reset_stats(struct blkcg_gq *blkg)
{
struct cfq_group *cfqg = blkg_to_cfqg(blkg);
cfqg_stats_reset(&cfqg->stats);
}
/*
* Search for the cfq group current task belongs to. request_queue lock must
* be held.