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blkcg: misc preparations for unified hierarchy interface

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* Export blkg_dev_name()

* Drop unnecessary @cft from __cfq_set_weight().

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Tejun Heo 2015-08-18 14:55:33 -07:00 committed by Jens Axboe
parent 69948b070e
commit dd165eb3bb
3 changed files with 7 additions and 5 deletions
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3
block/blk-cgroup.c
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@ -462,13 +462,14 @@ static int blkcg_reset_stats(struct cgroup_subsys_state *css,
return 0;
}
static const char *blkg_dev_name(struct blkcg_gq *blkg)
const char *blkg_dev_name(struct blkcg_gq *blkg)
{
/* some drivers (floppy) instantiate a queue w/o disk registered */
if (blkg->q->backing_dev_info.dev)
return dev_name(blkg->q->backing_dev_info.dev);
return NULL;
}
EXPORT_SYMBOL_GPL(blkg_dev_name);
/**
* blkcg_print_blkgs - helper for printing per-blkg data

8
block/cfq-iosched.c
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@ -1788,8 +1788,8 @@ static ssize_t cfqg_set_leaf_weight_device(struct kernfs_open_file *of,
return __cfqg_set_weight_device(of, buf, nbytes, off, true);
}
static int __cfq_set_weight(struct cgroup_subsys_state *css, struct cftype *cft,
u64 val, bool is_leaf_weight)
static int __cfq_set_weight(struct cgroup_subsys_state *css, u64 val,
bool is_leaf_weight)
{
struct blkcg *blkcg = css_to_blkcg(css);
struct blkcg_gq *blkg;
@ -1834,13 +1834,13 @@ out:
static int cfq_set_weight(struct cgroup_subsys_state *css, struct cftype *cft,
u64 val)
{
return __cfq_set_weight(css, cft, val, false);
return __cfq_set_weight(css, val, false);
}
static int cfq_set_leaf_weight(struct cgroup_subsys_state *css,
struct cftype *cft, u64 val)
{
return __cfq_set_weight(css, cft, val, true);
return __cfq_set_weight(css, val, true);
}
static int cfqg_print_stat(struct seq_file *sf, void *v)

1
include/linux/blk-cgroup.h
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@ -182,6 +182,7 @@ int blkcg_activate_policy(struct request_queue *q,
void blkcg_deactivate_policy(struct request_queue *q,
const struct blkcg_policy *pol);
const char *blkg_dev_name(struct blkcg_gq *blkg);
void blkcg_print_blkgs(struct seq_file *sf, struct blkcg *blkcg,
u64 (*prfill)(struct seq_file *,
struct blkg_policy_data *, int),