i386: lapic_timer_trigger: disable interrupts around lapic_timer_oneshot()

lapic_timer_oneshot() is not atomic.  We need to disable interrupts
when calling it to ensure the timer reaches a valid state.

Link: https://marc.info/?l=openbsd-tech&m=167482851403841&w=2
ok mlarkin@

diff --git a/sys/arch/i386/i386/lapic.c b/sys/arch/i386/i386/lapic.c
index 3671b31..fae8f71 100644 (file)
--- a/sys/arch/i386/i386/lapic.c
+++ b/sys/arch/i386/i386/lapic.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: lapic.c,v 1.54 2023/01/30 10:49:05 jsg Exp $  */
+/*     $OpenBSD: lapic.c,v 1.55 2023/02/09 01:41:15 cheloha Exp $      */
 /* $NetBSD: lapic.c,v 1.1.2.8 2000/02/23 06:10:50 sommerfeld Exp $ */
 
 /*-
@@ -271,7 +271,11 @@ lapic_timer_rearm(void *unused, uint64_t nsecs)
 void
 lapic_timer_trigger(void *unused)
 {
+       u_long s;
+
+       s = intr_disable();
        lapic_timer_oneshot(0, 1);
+       intr_restore(s);
 }
 
 /*