[src/trunk]: src/sys/dev/ic Minor tweaks for newer gcc

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

details:   https://anonhg.NetBSD.org/src/rev/eea887961062
branches:  trunk
changeset: 789891:eea887961062
user:      martin <martin%NetBSD.org@localhost>
date:      Thu Sep 12 12:54:39 2013 +0000

description:
Minor tweaks for newer gcc

diffstat:

 sys/dev/ic/com.c |  9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diffs (44 lines):

diff -r 2b5b1d1677d9 -r eea887961062 sys/dev/ic/com.c
--- a/sys/dev/ic/com.c  Thu Sep 12 12:45:53 2013 +0000
+++ b/sys/dev/ic/com.c  Thu Sep 12 12:54:39 2013 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: com.c,v 1.315 2013/09/03 15:32:55 jmcneill Exp $ */
+/* $NetBSD: com.c,v 1.316 2013/09/12 12:54:39 martin Exp $ */
 
 /*-
  * Copyright (c) 1998, 1999, 2004, 2008 The NetBSD Foundation, Inc.
@@ -66,7 +66,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.315 2013/09/03 15:32:55 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.316 2013/09/12 12:54:39 martin Exp $");
 
 #include "opt_com.h"
 #include "opt_ddb.h"
@@ -92,6 +92,7 @@
        do {                                    \
                console_debugger();             \
                cn_trapped = 1;                 \
+               (void)cn_trapped;               \
        } while (/* CONSTCOND */ 0)
 
 #include <sys/param.h>
@@ -1964,7 +1965,7 @@
 
                lsr = CSR_READ_1(regsp, COM_REG_LSR);
                if (ISSET(lsr, LSR_BI)) {
-                       int cn_trapped = 0;
+                       int cn_trapped = 0; /* see above: cn_trap() */
 
                        cn_check_magic(sc->sc_tty->t_dev,
                                       CNC_BREAK, com_cnm_state);
@@ -2184,7 +2185,7 @@
        c = CSR_READ_1(regsp, COM_REG_RXDATA);
        stat = CSR_READ_1(regsp, COM_REG_IIR);
        {
-               int cn_trapped = 0; /* unused */
+               int cn_trapped = 0;     /* required by cn_trap, see above */
 #ifdef DDB
                extern int db_active;
                if (!db_active)