MFD_HUGE_SHIFT
(MFD_HUGE_MASK << MFD_HUGE_SHIFT)))
(flags >> MFD_HUGE_SHIFT) &
flags |= __builtin_ctzll(hugetlbsize) << MFD_HUGE_SHIFT;
flags |= __builtin_ctzll(hugetlbsize) << MFD_HUGE_SHIFT;
mfd_flags |= (shift & MFD_HUGE_MASK) << MFD_HUGE_SHIFT;