GV_ENBLD_NOOVR
#define IS_ENABLED(v) ((v)->gv_flags & (GV_ENABLED | GV_ENBLD_NOOVR))
!(v->gv_flags & GV_ENBLD_NOOVR))
!(v->gv_flags & GV_ENBLD_NOOVR))
v->gv_flags = (v->gv_flags & ~GV_ENBLD_NOOVR) |
(enabled ? GV_ENBLD_NOOVR : 0);
v->gv_flags = (v->gv_flags & ~GV_ENBLD_NOOVR) |
(enabled ? GV_ENBLD_NOOVR : 0);
(!(v->gv_flags & GV_ENBLD_NOOVR)))