From 1440de203fc61243e639318e551645f626a268ce Mon Sep 17 00:00:00 2001
From: Alexander Motin <mav@FreeBSD.org>
Date: Sat, 12 Jun 2010 13:10:03 +0000
Subject: [PATCH] Check general TSC presence before doing more specific checks
 and printfs.

---
 sys/i386/i386/tsc.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sys/i386/i386/tsc.c b/sys/i386/i386/tsc.c
index 95f87f5bcde4..d0f7072f8161 100644
--- a/sys/i386/i386/tsc.c
+++ b/sys/i386/i386/tsc.c
@@ -123,6 +123,10 @@ init_TSC(void)
 void
 init_TSC_tc(void)
 {
+
+	if (!tsc_present) 
+		return;
+
 	/*
 	 * We can not use the TSC if we support APM.  Precise timekeeping
 	 * on an APM'ed machine is at best a fools pursuit, since 
@@ -152,7 +156,7 @@ init_TSC_tc(void)
 		tsc_timecounter.tc_quality = -100;
 #endif
 
-	if (tsc_present && tsc_freq != 0 && !tsc_is_broken) {
+	if (tsc_freq != 0 && !tsc_is_broken) {
 		tsc_timecounter.tc_frequency = tsc_freq;
 		tc_init(&tsc_timecounter);
 	}