UFSMNT_LOGGING
args.flags |= UFSMNT_LOGGING; /* default is logging */
args.flags &= ~UFSMNT_LOGGING;
args.flags |= UFSMNT_LOGGING;
args.flags &= ~UFSMNT_LOGGING;
if (args.flags & UFSMNT_LOGGING)
(void *)UFSMNT_LOGGING },