FMD_MOD_BUSY
ASSERT(!(mp->mod_flags & FMD_MOD_BUSY));
mp->mod_flags |= FMD_MOD_BUSY;
ASSERT(!(mp->mod_flags & FMD_MOD_BUSY));
mp->mod_flags |= FMD_MOD_BUSY;
ASSERT(mp->mod_flags & FMD_MOD_BUSY);
mp->mod_flags &= ~FMD_MOD_BUSY;
ASSERT(mp->mod_flags & FMD_MOD_BUSY);