MOUNT_ATTR_NODEV
(MOUNT_ATTR_RDONLY | MOUNT_ATTR_NOSUID | MOUNT_ATTR_NODEV | \
if (attr_flags & MOUNT_ATTR_NODEV)
attr_flags |= MOUNT_ATTR_NODEV;
if (flags & MOUNT_ATTR_NODEV)
#ifndef MOUNT_ATTR_NODEV