Function check_perf_event_open_access 

pub fn check_perf_event_open_access(
    current_task: &CurrentTask,
    perf_event_open_type: PerfEventOpenType,
) -> Result<(), Errno>

Checks whether current_task has the correct permissions for the given stage of a perf_event_open() call. Called by perf_event_open() once for each stage that applies to the new event. Corresponds to the perf_event_open LSM hook.