MNT_NODEV
#define MOPT_NODEV { "dev", 1, MNT_NODEV, 0 }
if (flags & MNT_NODEV) res = catopt(res, "nodev");
if (flags & MNT_NODEV) res = catopt(res, "nodev");
{ MNT_NODEV, "nodev" },
flags |= MNT_NOSUID | MNT_NODEV;
mp->mnt_flag &=~ (MNT_NOSUID | MNT_NOEXEC | MNT_NODEV |
MNT_NODEV | MNT_SYNCHRONOUS | MNT_ASYNC | MNT_FORCE |
MNT_NOSUID | MNT_NODEV | \
{ MNT_NODEV, "nodev" },