percpu_ref_exit

Name:percpu_ref_exit - undo percpu_ref_init()*@ref: percpu_ref to exit* This function exits @ref

Proto:void percpu_ref_exit(struct percpu_ref *ref)

Type:void

Parameter:

Type	Parameter	Name
struct percpu_ref *	ref

107

__percpu * percpu_count = percpu_count_ptr(ref)

109

If percpu_count Then

111

WARN_ON_ONCE(confirm_switch)

112

free previously allocated percpu memory

113

* The low bit of the pointer indicates whether the ref is in percpu * mode; if set, then get/put will manipulate the atomic_t. = __PERCPU_REF_ATOMIC_DEAD

**Caller**
Name	Describe
percpu_ref_call_confirm_rcu
css_free_rwork_fn	ss destruction is four-stage process
cgroup_create	The returned cgroup is fully initialized including its control mask, but* it isn't associated with its kernfs_node and doesn't have the control* mask applied.
cgroup_bpf_release	group_bpf_release() - put references of all bpf programs and* release all cgroup bpf data*@work: work structure embedded into the cgroup to modify
cgroup_bpf_inherit	group_bpf_inherit() - inherit effective programs from parent*@cgrp: the cgroup to modify
blk_alloc_queue_node	lk_alloc_queue_node - allocate a request queue@gfp_mask: memory allocation flags@node_id: NUMA node to allocate memory from
blkg_free	lkg_free - free a blkg@blkg: blkg to free Free @blkg which may be partially allocated.
free_ioctx	_ioctx() should be RCU delayed to synchronize against the RCU* protected lookup_ioctx() and also needs process context to call* aio_free_ring(). Use rcu_work.
ioctx_alloc	x_alloc* Allocates and initializes an ioctx. Returns an ERR_PTR if it failed.
io_ring_ctx_free

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