Function bump

crates/kernel/src/perf.rs:87–91

(counter: &AtomicU64)

/// collapses to a single branch + return.
#[inline(always)]
fn bump(counter: &AtomicU64) {
  if enabled() {
    counter.fetch_add(1, Ordering::Relaxed);
  }
}

impl PerfCounters {
  // -----------------------------------------------------------------------