From e251c42197225d3783699343e0805c425aeae8e9 Mon Sep 17 00:00:00 2001
From: Hamish Guthrie <hamish@prodigi.ch>
Date: Wed, 17 Aug 2005 04:48:17 +0000
Subject: Changed udelay in delay_tsc to be more be more considerate of single
 processor environments.

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2009 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
---
 src/cpu/x86/tsc/delay_tsc.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/cpu/x86/tsc/delay_tsc.c')

diff --git a/src/cpu/x86/tsc/delay_tsc.c b/src/cpu/x86/tsc/delay_tsc.c
index c7c431baac..31c5bf80eb 100644
--- a/src/cpu/x86/tsc/delay_tsc.c
+++ b/src/cpu/x86/tsc/delay_tsc.c
@@ -159,7 +159,11 @@ void udelay(unsigned us)
         count = rdtscll();
         stop = clocks + count;
         while(stop > count) {
+#ifdef CONFIG_SMP
+#if CONFIG_SMP == 1
 		cpu_relax();
+#endif
+#endif
 		count = rdtscll();
         }
 }
-- 
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