ppp_tty uiomove() conversion

[Martin Natano]

Below the uiomove() conversion for net/ppp_tty.c. M_TRAILINGSPACE()
returns int, but the result can't be negative, so using u_int for the
return value should be fine.

Index: net/ppp_tty.c
===================================================================
RCS file: /cvs/src/sys/net/ppp_tty.c,v
retrieving revision 1.41
diff -u -p -u -r1.41 ppp_tty.c
--- net/ppp_tty.c       21 Dec 2015 21:49:02 -0000      1.41
+++ net/ppp_tty.c       13 Jan 2016 19:44:53 -0000
@@ -321,7 +321,7 @@ pppread(struct tty *tp, struct uio *uio,
     splx(s);
 
     for (m = m0; m && uio->uio_resid; m = m->m_next)
-       if ((error = uiomovei(mtod(m, u_char *), m->m_len, uio)) != 0)
+       if ((error = uiomove(mtod(m, u_char *), m->m_len, uio)) != 0)
            break;
     m_freem(m0);
     return (error);
@@ -336,7 +336,8 @@ pppwrite(struct tty *tp, struct uio *uio
     struct ppp_softc *sc = (struct ppp_softc *)tp->t_sc;
     struct mbuf *m, *m0, **mp;
     struct sockaddr dst;
-    int len, error;
+    u_int len;
+    int error;
 
     if ((tp->t_state & TS_CARR_ON) == 0 && (tp->t_cflag & CLOCAL) == 0)
        return 0;               /* wrote 0 bytes */
@@ -361,7 +362,7 @@ pppwrite(struct tty *tp, struct uio *uio
        len = M_TRAILINGSPACE(m);
        if (len > uio->uio_resid)
            len = uio->uio_resid;
-       if ((error = uiomovei(mtod(m, u_char *), len, uio)) != 0) {
+       if ((error = uiomove(mtod(m, u_char *), len, uio)) != 0) {
            m_freem(m0);
            return (error);
        }

cheers,
natano