[src/trunk]: src/sys/kern add some (uint64_t) casts so avoid 32 bit overflows...

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

details:   https://anonhg.NetBSD.org/src/rev/e128a3ee977f
branches:  trunk
changeset: 758014:e128a3ee977f
user:      mrg <mrg%NetBSD.org@localhost>
date:      Thu Oct 14 00:47:16 2010 +0000

description:
add some (uint64_t) casts so avoid 32 bit overflows.  this fixes my
3TB disk with 4KB sectors and disklabel (which looks like it would
work upto 16TB.)

idea from mlelstv@.

diffstat:

 sys/kern/subr_disk.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (29 lines):

diff -r 3f042d879a6e -r e128a3ee977f sys/kern/subr_disk.c
--- a/sys/kern/subr_disk.c      Wed Oct 13 14:34:27 2010 +0000
+++ b/sys/kern/subr_disk.c      Thu Oct 14 00:47:16 2010 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: subr_disk.c,v 1.99 2009/11/28 22:38:07 dsl Exp $       */
+/*     $NetBSD: subr_disk.c,v 1.100 2010/10/14 00:47:16 mrg Exp $      */
 
 /*-
  * Copyright (c) 1996, 1997, 1999, 2000, 2009 The NetBSD Foundation, Inc.
@@ -67,7 +67,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_disk.c,v 1.99 2009/11/28 22:38:07 dsl Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_disk.c,v 1.100 2010/10/14 00:47:16 mrg Exp $");
 
 #include <sys/param.h>
 #include <sys/kernel.h>
@@ -363,8 +363,8 @@
                return -1;
        }
 
-       p_size = p->p_size << dk->dk_blkshift;
-       p_offset = p->p_offset << dk->dk_blkshift;
+       p_size = (uint64_t)p->p_size << dk->dk_blkshift;
+       p_offset = (uint64_t)p->p_offset << dk->dk_blkshift;
 #if RAW_PART == 3
        labelsector = lp->d_partitions[2].p_offset;
 #else