diff --git a/[refs] b/[refs]
index 259ff8127ed5..79dc7e430341 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 418ccbe37f70f5021c4cd1cdcb0ce7f98d05f2dd
+refs/heads/master: edaf420fdc122e7a42326fe39274c8b8c9b19d41
diff --git a/trunk/arch/x86/kernel/tsc_32.c b/trunk/arch/x86/kernel/tsc_32.c
index d78444c788a3..f04d08a7d022 100644
--- a/trunk/arch/x86/kernel/tsc_32.c
+++ b/trunk/arch/x86/kernel/tsc_32.c
@@ -131,7 +131,7 @@ unsigned long native_calculate_cpu_khz(void)
 {
 	unsigned long long start, end;
 	unsigned long count;
-	u64 delta64;
+	u64 delta64 = (u64)ULLONG_MAX;
 	int i;
 	unsigned long flags;
 
@@ -143,6 +143,7 @@ unsigned long native_calculate_cpu_khz(void)
 		rdtscll(start);
 		mach_countup(&count);
 		rdtscll(end);
+		delta64 = min(delta64, (end - start));
 	}
 	/*
 	 * Error: ECTCNEVERSET
@@ -153,8 +154,6 @@ unsigned long native_calculate_cpu_khz(void)
 	if (count <= 1)
 		goto err;
 
-	delta64 = end - start;
-
 	/* cpu freq too fast: */
 	if (delta64 > (1ULL<<32))
 		goto err;