_Q_LOCK_CPU_MASK
if (lock & _Q_LOCK_CPU_MASK)
return lock & _Q_LOCK_CPU_MASK;
if ((old & _Q_LOCK_CPU_MASK) == 0 &&
owner = old & _Q_LOCK_CPU_MASK;
owner = old & _Q_LOCK_CPU_MASK;
cpu = READ_ONCE(lp->lock) & _Q_LOCK_CPU_MASK;
#define _Q_LOCK_MASK (_Q_LOCK_CPU_MASK | _Q_LOCK_STEAL_MASK)