_Q_TAIL_IDX_MASK   54 arch/s390/lib/spinlock.c #define _Q_TAIL_IDX_MASK	0x000c0000
_Q_TAIL_IDX_MASK   91 include/asm-generic/qspinlock_types.h #define _Q_TAIL_IDX_MASK	_Q_SET_MASK(TAIL_IDX)