blkcg_policy_unregister

Name:lkcg_policy_unregister - unregister a blkcg policy*@pol: blkcg policy to unregister* Undo blkcg_policy_register(@pol). Might sleep.

Proto:void blkcg_policy_unregister(struct blkcg_policy *pol)

Type:void

Parameter:

Type	Parameter	Name
struct blkcg_policy *	pol

1458

mutex_lock( & lkcg_pol_mutex protects blkcg_policy[] and policy [de]activation.* blkcg_pol_register_mutex nests outside of it and synchronizes entire* policy [un]register operations including cgroup file additions /* removals)

1460

If WARN_ON(blkcg_policy[plid] != pol) Then Go to out_unlock

1464

If cgroup files for the policy Then group_rm_cftypes - remove an array of cftypes from a subsystem*@cfts: zero-length name terminated array of cftypes* Unregister @cfts. Files described by @cfts are removed from all* existing cgroups and all future cgroups won't have them either. This

1466

If legacy_cftypes Then group_rm_cftypes - remove an array of cftypes from a subsystem*@cfts: zero-length name terminated array of cftypes* Unregister @cfts. Files described by @cfts are removed from all* existing cgroups and all future cgroups won't have them either. This

1470

mutex_lock( & blkcg_pol_mutex)

1472

If cpd_free_fn Then

1474

If cpd[plid] Then

1475

cpd_free_fn(cpd[plid])

1476

cpd[plid] = NULL

1480

=

1482

mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

1483

1484

mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

**Caller**
Name	Describe
iolatency_exit
ioc_exit

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