MI4_POSIX_LOCK
{ "MI4_POSIX_LOCK", MI4_POSIX_LOCK, MI4_POSIX_LOCK },
{"MI4_POSIX_LOCK", MI4_POSIX_LOCK, MI4_POSIX_LOCK},
VTOMI4(dvp)->mi_flags |= MI4_POSIX_LOCK;
(!(mi->mi_flags & MI4_POSIX_LOCK))) {