[src/nick-nhusb]: src/sys/dev/usb Style and sprinkle const.

[skrll <skrll%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d1835f7073b5
branches:  nick-nhusb
changeset: 334549:d1835f7073b5
user:      skrll <skrll%NetBSD.org@localhost>
date:      Thu Oct 27 12:30:54 2016 +0000

description:
Style and sprinkle const.

diffstat:

 sys/dev/usb/ucom.c |  46 +++++++++++++++++++++++++---------------------
 1 files changed, 25 insertions(+), 21 deletions(-)

diffs (145 lines):

diff -r 13b788bef78d -r d1835f7073b5 sys/dev/usb/ucom.c
--- a/sys/dev/usb/ucom.c        Thu Oct 27 07:46:19 2016 +0000
+++ b/sys/dev/usb/ucom.c        Thu Oct 27 12:30:54 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ucom.c,v 1.108.2.24 2016/10/27 07:46:19 skrll Exp $    */
+/*     $NetBSD: ucom.c,v 1.108.2.25 2016/10/27 12:30:54 skrll Exp $    */
 
 /*
  * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
@@ -34,7 +34,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.108.2.24 2016/10/27 07:46:19 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ucom.c,v 1.108.2.25 2016/10/27 12:30:54 skrll Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -538,8 +538,8 @@
 int
 ucomopen(dev_t dev, int flag, int mode, struct lwp *l)
 {
-       int unit = UCOMUNIT(dev);
-       struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit);
+       const int unit = UCOMUNIT(dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
        struct ucom_buffer *ub;
        int error;
 
@@ -701,7 +701,8 @@
 int
 ucomclose(dev_t dev, int flag, int mode, struct lwp *l)
 {
-       struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev));
+       const int unit = UCOMUNIT(dev);
+       struct ucom_softc *sc = device_lookup_private(&ucom_cd, unit);
 
        UCOMHIST_FUNC(); UCOMHIST_CALLED();
 
@@ -753,7 +754,8 @@
 int
 ucomread(dev_t dev, struct uio *uio, int flag)
 {
-       struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev));
+       const int unit = UCOMUNIT(dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
        int error;
 
        UCOMHIST_FUNC(); UCOMHIST_CALLED();
@@ -785,7 +787,8 @@
 int
 ucomwrite(dev_t dev, struct uio *uio, int flag)
 {
-       struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev));
+       const int unit = UCOMUNIT(dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
        int error;
 
        if (sc == NULL)
@@ -815,10 +818,9 @@
 int
 ucompoll(dev_t dev, int events, struct lwp *l)
 {
-       struct ucom_softc *sc;
-       int revents;
+       const int unit = UCOMUNIT(dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
 
-       sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev));
        if (sc == NULL)
                return POLLHUP;
 
@@ -832,7 +834,7 @@
        sc->sc_refcnt++;
        mutex_exit(&sc->sc_lock);
 
-       revents = ((*tp->t_linesw->l_poll)(tp, events, l));
+       int revents = ((*tp->t_linesw->l_poll)(tp, events, l));
 
        mutex_enter(&sc->sc_lock);
        if (--sc->sc_refcnt < 0)
@@ -845,7 +847,8 @@
 struct tty *
 ucomtty(dev_t dev)
 {
-       struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev));
+       const int unit = UCOMUNIT(dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
 
        return sc != NULL ? sc->sc_tty : NULL;
 }
@@ -853,7 +856,8 @@
 int
 ucomioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
 {
-       struct ucom_softc *sc = device_lookup_private(&ucom_cd, UCOMUNIT(dev));
+       const int unit = UCOMUNIT(dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
        int error;
 
        if (sc == NULL)
@@ -1111,8 +1115,8 @@
 static int
 ucomparam(struct tty *tp, struct termios *t)
 {
-       struct ucom_softc *sc = device_lookup_private(&ucom_cd,
-           UCOMUNIT(tp->t_dev));
+       const int unit = UCOMUNIT(tp->t_dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
        int error;
 
        UCOMHIST_FUNC(); UCOMHIST_CALLED();
@@ -1182,8 +1186,8 @@
 static int
 ucomhwiflow(struct tty *tp, int block)
 {
-       struct ucom_softc *sc = device_lookup_private(&ucom_cd,
-           UCOMUNIT(tp->t_dev));
+       const int unit = UCOMUNIT(tp->t_dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
        int old;
 
        if (sc == NULL)
@@ -1205,8 +1209,8 @@
 static void
 ucomstart(struct tty *tp)
 {
-       struct ucom_softc *sc = device_lookup_private(&ucom_cd,
-           UCOMUNIT(tp->t_dev));
+       const int unit = UCOMUNIT(tp->t_dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
        struct ucom_buffer *ub;
        u_char *data;
        int cnt;
@@ -1270,8 +1274,8 @@
 ucomstop(struct tty *tp, int flag)
 {
 #if 0
-       struct ucom_softc *sc =
-           device_lookup_private(&ucom_cd, UCOMUNIT(tp->t_dev));
+       const int unit = UCOMUNIT(tp->t_dev);
+       struct ucom_softc * const sc = device_lookup_private(&ucom_cd, unit);
 
        mutex_enter(&sc->sc_lock);
        mutex_spin_enter(&tty_lock);