HUGETLB_SHMFS_INODE
if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) {
if (creat_flags == HUGETLB_SHMFS_INODE)
HUGETLB_SHMFS_INODE, (shmflg >> SHM_HUGE_SHIFT) & SHM_HUGE_MASK);