Question, isn't this a bug? static enum hrtimer_restart perf_swevent_hrtimer(struct hrtimer *hrtimer) { - if (event->state != PERF_EVENT_STATE_ACTIVE) + if (event->state != PERF_EVENT_STATE_ACTIVE || + event->hw.state & PERF_HES_STOPPED) return HRTIMER_NORESTART;

The bug being that the precedence of || is higher than the precedence of != ? Consider writing it if ((event->state != PERF_EVENT_STATE_ACTIVE) || (event->hw_state & PERF_HES_STOPPED))

This coming from a person who has too many scars from not parenthesizing my expressions in conditionals to ensure they work the way I meant them to work.