Currently one can open multiple instances of /dev/ttyU* since ucom(4)
just checks 'TS_ISOPEN' against /dev/cuaU* access. There are quiet a
lot of flags in ucom.c so it's a bit difficult to understand what the
initial idea was. But moving the 'TS_ISOPEN' check before the UCOMCUA
branch makes /dev/
The setupterm(3) manual states:
> If errret is not null, then setupterm returns OK or ERR and stores a
> status value in the integer pointed to by errret.
> ...
> If errret is null, setupterm prints an error message upon finding an
> error and exits.
Since less(1) passes NULL, it will no
> Index: arch/amd64/amd64/cbfb.c
> +struct cfattach cbfb_ca = {
> + sizeof(struct cbfb_softc), cbfb_match, cbfb_attach, NULL
> +};
Make it const.
> +void
> +cbfb_rasops_preinit(struct cbfb *cbfb)
> +{
> +#define bmnum(_x) (fls(_x) - ffs(_x) + 1)
> +#define bmpos(_x) (ffs(_x) - 1)
These two
