C2C_MAX_ACTIVE_EVENTS
struct perf_event *events[C2C_MAX_ACTIVE_EVENTS];
DECLARE_BITMAP(used_ctrs, C2C_MAX_ACTIVE_EVENTS);
idx = find_first_zero_bit(hw_events->used_ctrs, C2C_MAX_ACTIVE_EVENTS);
if (idx >= C2C_MAX_ACTIVE_EVENTS)
if (bitmap_empty(c2c_pmu->hw_events.used_ctrs, C2C_MAX_ACTIVE_EVENTS))
C2C_MAX_ACTIVE_EVENTS) {