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Use 64-bit intermediate in get_tsc_offset_ns to avoid overflow.

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Discussed (3 weeks ago) on port-xen; okayed by yamt@, bouyer@.
This commit is contained in:
jld 2006-02-03 04:59:03 +00:00
parent 294582997b
commit 12c1c974f7
1 changed files with 5 additions and 5 deletions
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10
sys/arch/xen/xen/clock.c
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@ -1,4 +1,4 @@
/* $NetBSD: clock.c,v 1.16 2006/01/15 22:09:52 bouyer Exp $ */
/* $NetBSD: clock.c,v 1.17 2006/02/03 04:59:03 jld Exp $ */
/*
*
@ -34,7 +34,7 @@
#include "opt_xen.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.16 2006/01/15 22:09:52 bouyer Exp $");
__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.17 2006/02/03 04:59:03 jld Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -110,11 +110,11 @@ get_time_values_from_xen(void)
static uint64_t
get_tsc_offset_ns(void)
{
uint32_t tsc_delta;
uint64_t tsc_delta;
struct cpu_info *ci = curcpu();
tsc_delta = cpu_counter32() - shadow_tsc_stamp;
return tsc_delta * 1000000000 / cpu_frequency(ci);
tsc_delta = cpu_counter() - shadow_tsc_stamp;
return tsc_delta * 1000000000ULL / cpu_frequency(ci);
}
void