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blk-cgroup: delete cpd_bind_fn of blkcg_policy

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cpd_bind_fn is just used for update default weight when block
subsys attached to a hierarchy. No any policy need it anymore.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230406145050.49914-3-zhouchengming@bytedance.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Chengming Zhou 2023-04-06 22:50:49 +08:00 committed by Jens Axboe
parent e9f2f3f590
commit d1023165ee
2 changed files with 0 additions and 22 deletions
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21
block/blk-cgroup.c
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@ -1355,26 +1355,6 @@ void blkcg_exit_disk(struct gendisk *disk)
blk_throtl_exit(disk);
}
static void blkcg_bind(struct cgroup_subsys_state *root_css)
{
int i;
mutex_lock(&blkcg_pol_mutex);
for (i = 0; i < BLKCG_MAX_POLS; i++) {
struct blkcg_policy *pol = blkcg_policy[i];
struct blkcg *blkcg;
if (!pol || !pol->cpd_bind_fn)
continue;
list_for_each_entry(blkcg, &all_blkcgs, all_blkcgs_node)
if (blkcg->cpd[pol->plid])
pol->cpd_bind_fn(blkcg->cpd[pol->plid]);
}
mutex_unlock(&blkcg_pol_mutex);
}
static void blkcg_exit(struct task_struct *tsk)
{
if (tsk->throttle_disk)
@ -1388,7 +1368,6 @@ struct cgroup_subsys io_cgrp_subsys = {
.css_offline = blkcg_css_offline,
.css_free = blkcg_css_free,
.css_rstat_flush = blkcg_rstat_flush,
.bind = blkcg_bind,
.dfl_cftypes = blkcg_files,
.legacy_cftypes = blkcg_legacy_files,
.legacy_name = "blkio",

1
block/blk-cgroup.h
View File

@ -175,7 +175,6 @@ struct blkcg_policy {
blkcg_pol_alloc_cpd_fn *cpd_alloc_fn;
blkcg_pol_init_cpd_fn *cpd_init_fn;
blkcg_pol_free_cpd_fn *cpd_free_fn;
blkcg_pol_bind_cpd_fn *cpd_bind_fn;
blkcg_pol_alloc_pd_fn *pd_alloc_fn;
blkcg_pol_init_pd_fn *pd_init_fn;