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blkcg: collapse blkcg_policy_ops into blkcg_policy 

There's no reason to keep blkcg_policy_ops separate.  Collapse it into
blkcg_policy.

This patch doesn't introduce any functional change.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Tejun Heo 2012-04-16 13:57:27 -07:00 committed by Jens Axboe
parent f95a04afa8
commit f9fcc2d391
4 changed files with 24 additions and 28 deletions
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16
block/blk-cgroup.c
View File

@ -78,8 +78,8 @@ static void blkg_free(struct blkcg_gq *blkg)
if (!pd) if (!pd)
continue; continue;
if (pol && pol->ops.pd_exit_fn) if (pol && pol->pd_exit_fn)
pol->ops.pd_exit_fn(blkg); pol->pd_exit_fn(blkg);
kfree(pd); kfree(pd);
} }
@ -132,7 +132,7 @@ static struct blkcg_gq *blkg_alloc(struct blkcg *blkcg, struct request_queue *q)
struct blkcg_policy *pol = blkcg_policy[i]; struct blkcg_policy *pol = blkcg_policy[i];
if (blkcg_policy_enabled(blkg->q, pol)) if (blkcg_policy_enabled(blkg->q, pol))
pol->ops.pd_init_fn(blkg); pol->pd_init_fn(blkg);
} }
return blkg; return blkg;
@ -305,8 +305,8 @@ static int blkcg_reset_stats(struct cgroup *cgroup, struct cftype *cftype,
struct blkcg_policy *pol = blkcg_policy[i]; struct blkcg_policy *pol = blkcg_policy[i];
if (blkcg_policy_enabled(blkg->q, pol) && if (blkcg_policy_enabled(blkg->q, pol) &&
pol->ops.pd_reset_stats_fn) pol->pd_reset_stats_fn)
pol->ops.pd_reset_stats_fn(blkg); pol->pd_reset_stats_fn(blkg);
} }
} }
@ -758,7 +758,7 @@ int blkcg_activate_policy(struct request_queue *q,
blkg->pd[pol->plid] = pd; blkg->pd[pol->plid] = pd;
pd->blkg = blkg; pd->blkg = blkg;
pol->ops.pd_init_fn(blkg); pol->pd_init_fn(blkg);
spin_unlock(&blkg->blkcg->lock); spin_unlock(&blkg->blkcg->lock);
} }
@ -804,8 +804,8 @@ void blkcg_deactivate_policy(struct request_queue *q,
/* grab blkcg lock too while removing @pd from @blkg */ /* grab blkcg lock too while removing @pd from @blkg */
spin_lock(&blkg->blkcg->lock); spin_lock(&blkg->blkcg->lock);
if (pol->ops.pd_exit_fn) if (pol->pd_exit_fn)
pol->ops.pd_exit_fn(blkg); pol->pd_exit_fn(blkg);
kfree(blkg->pd[pol->plid]); kfree(blkg->pd[pol->plid]);
blkg->pd[pol->plid] = NULL; blkg->pd[pol->plid] = NULL;

12
block/blk-cgroup.h
View File

@ -99,19 +99,17 @@ typedef void (blkcg_pol_init_pd_fn)(struct blkcg_gq *blkg);
typedef void (blkcg_pol_exit_pd_fn)(struct blkcg_gq *blkg); typedef void (blkcg_pol_exit_pd_fn)(struct blkcg_gq *blkg);
typedef void (blkcg_pol_reset_pd_stats_fn)(struct blkcg_gq *blkg); typedef void (blkcg_pol_reset_pd_stats_fn)(struct blkcg_gq *blkg);
struct blkcg_policy_ops {
blkcg_pol_init_pd_fn *pd_init_fn;
blkcg_pol_exit_pd_fn *pd_exit_fn;
blkcg_pol_reset_pd_stats_fn *pd_reset_stats_fn;
};
struct blkcg_policy { struct blkcg_policy {
struct blkcg_policy_ops ops;
int plid; int plid;
/* policy specific private data size */ /* policy specific private data size */
size_t pd_size; size_t pd_size;
/* cgroup files for the policy */ /* cgroup files for the policy */
struct cftype *cftypes; struct cftype *cftypes;
/* operations */
blkcg_pol_init_pd_fn *pd_init_fn;
blkcg_pol_exit_pd_fn *pd_exit_fn;
blkcg_pol_reset_pd_stats_fn *pd_reset_stats_fn;
}; };
extern struct blkcg blkcg_root; extern struct blkcg blkcg_root;

13
block/blk-throttle.c
View File

@ -1100,13 +1100,12 @@ static void throtl_shutdown_wq(struct request_queue *q)
} }
static struct blkcg_policy blkcg_policy_throtl = { static struct blkcg_policy blkcg_policy_throtl = {
.ops = { .pd_size = sizeof(struct throtl_grp),
.pd_init_fn = throtl_pd_init, .cftypes = throtl_files,
.pd_exit_fn = throtl_pd_exit,
.pd_reset_stats_fn = throtl_pd_reset_stats, .pd_init_fn = throtl_pd_init,
}, .pd_exit_fn = throtl_pd_exit,
.pd_size = sizeof(struct throtl_grp), .pd_reset_stats_fn = throtl_pd_reset_stats,
.cftypes = throtl_files,
}; };
bool blk_throtl_bio(struct request_queue *q, struct bio *bio) bool blk_throtl_bio(struct request_queue *q, struct bio *bio)

11
block/cfq-iosched.c
View File

@ -4165,12 +4165,11 @@ static struct elevator_type iosched_cfq = {
#ifdef CONFIG_CFQ_GROUP_IOSCHED #ifdef CONFIG_CFQ_GROUP_IOSCHED
static struct blkcg_policy blkcg_policy_cfq = { static struct blkcg_policy blkcg_policy_cfq = {
.ops = { .pd_size = sizeof(struct cfq_group),
.pd_init_fn = cfq_pd_init, .cftypes = cfq_blkcg_files,
.pd_reset_stats_fn = cfq_pd_reset_stats,
}, .pd_init_fn = cfq_pd_init,
.pd_size = sizeof(struct cfq_group), .pd_reset_stats_fn = cfq_pd_reset_stats,
.cftypes = cfq_blkcg_files,
}; };
#endif #endif