[src/trunk]: src/sys/arch/usermode/dev make room for a small msgbuf

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

details:   https://anonhg.NetBSD.org/src/rev/1257c8544e0f
branches:  trunk
changeset: 768682:1257c8544e0f
user:      jmcneill <jmcneill%NetBSD.org@localhost>
date:      Wed Aug 24 19:55:35 2011 +0000

description:
make room for a small msgbuf

diffstat:

 sys/arch/usermode/dev/cpu.c |  12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diffs (47 lines):

diff -r 2992dd528137 -r 1257c8544e0f sys/arch/usermode/dev/cpu.c
--- a/sys/arch/usermode/dev/cpu.c       Wed Aug 24 19:42:52 2011 +0000
+++ b/sys/arch/usermode/dev/cpu.c       Wed Aug 24 19:55:35 2011 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: cpu.c,v 1.15 2011/08/13 14:06:54 jmcneill Exp $ */
+/* $NetBSD: cpu.c,v 1.16 2011/08/24 19:55:35 jmcneill Exp $ */
 
 /*-
  * Copyright (c) 2007 Jared D. McNeill <jmcneill%invisible.ca@localhost>
@@ -27,7 +27,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.15 2011/08/13 14:06:54 jmcneill Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpu.c,v 1.16 2011/08/24 19:55:35 jmcneill Exp $");
 
 #include <sys/param.h>
 #include <sys/conf.h>
@@ -38,6 +38,7 @@
 #include <sys/lwp.h>
 #include <sys/cpu.h>
 #include <sys/mbuf.h>
+#include <sys/msgbuf.h>
 
 #include <dev/cons.h>
 
@@ -69,6 +70,7 @@
 } cpu_softc_t;
 
 static struct pcb lwp0pcb;
+static void *msgbuf;
 
 CFATTACH_DECL_NEW(cpu, sizeof(cpu_softc_t), cpu_match, cpu_attach, NULL, NULL);
 
@@ -311,6 +313,12 @@
 void
 cpu_startup(void)
 {
+
+       msgbuf = thunk_malloc(PAGE_SIZE);
+       if (msgbuf == NULL)
+               panic("couldn't allocate msgbuf");
+       initmsgbuf(msgbuf, PAGE_SIZE);
+
        banner();
 
        memset(&lwp0pcb, 0, sizeof(lwp0pcb));