hsw_get_event_constraints
return hsw_get_event_constraints(cpuc, idx, event);
struct event_constraint *c = hsw_get_event_constraints(cpuc, idx, event);
x86_pmu.get_event_constraints = hsw_get_event_constraints;
x86_pmu.get_event_constraints = hsw_get_event_constraints;
x86_pmu.get_event_constraints = hsw_get_event_constraints;