io_wqe_cancel_cb_work

Name:io_wqe_cancel_cb_work

Proto:static enum io_wq_cancel io_wqe_cancel_cb_work(struct io_wqe *wqe, work_cancel_fn *cancel, void *cancel_data)

Type:enum io_wq_cancel

Parameter:

Type	Parameter	Name
struct io_wqe *	wqe
work_cancel_fn *	cancel
void *	cancel_data

862

struct io_cb_cancel_data data = {wqe = wqe, cancel = cancel, caller_data = cancel_data, }

870

bool found = false

872

spin_lock_irqsave( & lock, flags)

874

work = container_of - cast a member of a structure out to the containing structure*@ptr: the pointer to the member.*@type: the type of the container struct this is embedded in.*@member: the name of the member within the struct.(node, structio_wq_work, list)

876

If cancel(work, cancel_data) Then

877

wq_node_del( & work_list, node, prev)

878

found = true

879

Break

882

spin_unlock_irqrestore( & lock, flags)

884

If found Then

885

flags |= IO_WQ_WORK_CANCEL

886

887

Return cancelled before started

890

_read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other

891

found = Iterate the passed in list and call the specific function for each* worker that isn't exiting

892

_read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()

893

Return If found Then found, running, and attempted cancelled Else work not found

**Caller**
Name	Describe
io_wq_cancel_cb

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