MASK
#define MASK(nbits) ((1 << nbits) - 1)
#define MASK ((uint64_t)-1)
#define MASK ((uint32_t)-1)
#define MASK 2
#define MASK 0x4070
MASK,
#define MASK(v) ((1 << (v)) - 1)
#define MASK(entry) (UVM_ET_ISCOPYONWRITE(entry) ? \
#define MASK(entry) (UVM_ET_ISCOPYONWRITE(entry) ? \
#undef MASK
#define MASK(a) (1 << NFSPROC_##a)
#define MASK HEX