___lsb
static inline uint64_t ___bitmask(uint64_t f) { return (f / ___lsb(f)); }
return ((v & f) / ___lsb(f)); \
return ((le ## _n ## _to_cpu(v) & f) / ___lsb(f)); \
return ((v & ___bitmask(f)) * ___lsb(f)); \
return (cpu_to_le ## _n((v & ___bitmask(f)) * ___lsb(f))); \