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Fix accidentally unsigned comparison, which was causing the timer event 

handler to run ~forever in the face of slightly unexpected input from
Xen (system_time apparently going backwards).  Pointed out by kardel@.
This commit is contained in:
jld 2006-07-04 07:35:28 +00:00
parent 78877867ee
commit 3ebfa1a07d
1 changed files with 3 additions and 3 deletions
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6
sys/arch/xen/xen/clock.c
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@ -1,4 +1,4 @@
/* $NetBSD: clock.c,v 1.25 2006/05/28 13:36:28 bouyer Exp $ */ /* $NetBSD: clock.c,v 1.26 2006/07/04 07:35:28 jld Exp $ */
/* /*
* *
@ -34,7 +34,7 @@
#include "opt_xen.h" #include "opt_xen.h"
#include <sys/cdefs.h> #include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.25 2006/05/28 13:36:28 bouyer Exp $"); __KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.26 2006/07/04 07:35:28 jld Exp $");
#include <sys/param.h> #include <sys/param.h>
#include <sys/systm.h> #include <sys/systm.h>
@ -439,7 +439,7 @@ xen_timer_handler(void *arg, struct intrframe *regs)
ticks_done = 0; ticks_done = 0;
delta = (int64_t)(shadow_system_time + get_tsc_offset_ns() delta = (int64_t)(shadow_system_time + get_tsc_offset_ns()
- processed_system_time); - processed_system_time);
while (delta >= NS_PER_TICK) { while (delta >= (int64_t)NS_PER_TICK) {
/* Have hardclock do its thing. */ /* Have hardclock do its thing. */
oldtime = time; oldtime = time;
hardclock((struct clockframe *)regs); hardclock((struct clockframe *)regs);