perf_pin_task

Name:Get the context for a task and increment its pin_count so it* can't get swapped to another task. This also increments its* reference count so that the context can't get freed.

Proto:static struct perf_event_context *perf_pin_task_context(struct task_struct *task, int ctxn)

Type:struct perf_event_context

Parameter:

Type	Parameter	Name
struct task_struct *	task
int	ctxn

1430

ctx = Get the perf_event_context for a task and lock it.* This has to cope with with the fact that until it is locked,* the context could get moved to another task.

1431

If ctx Then

1432

++pin_count

1433

raw_spin_unlock_irqrestore( & Protect the states of the events in the list,* nr_active, and the list:, flags)

1435

Return ctx

**Caller**
Name	Describe
perf_event_exit_task_context
perf_event_init_context	Initialize the perf_event context in task_struct

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Function report