BIT_ULL_MASK 12 include/linux/bits.h #define BIT_ULL_MASK(nr) (ULL(1) << ((nr) % BITS_PER_LONG_LONG)) BIT_ULL_MASK 12 tools/include/linux/bits.h #define BIT_ULL_MASK(nr) (ULL(1) << ((nr) % BITS_PER_LONG_LONG))