diff --git a/[refs] b/[refs]
index 1cbb1f9b57ff..ca899a54b3cd 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f7676254f179eac6b5244a80195ec8ae0e9d4606
+refs/heads/master: 72d43d9bc9210d24d09202eaf219eac09e17b339
diff --git a/trunk/arch/x86/kernel/hpet.c b/trunk/arch/x86/kernel/hpet.c
index 801497a16e0e..73deaffadd03 100644
--- a/trunk/arch/x86/kernel/hpet.c
+++ b/trunk/arch/x86/kernel/hpet.c
@@ -278,6 +278,13 @@ static int hpet_legacy_next_event(unsigned long delta,
 	cnt += (u32) delta;
 	hpet_writel(cnt, HPET_T0_CMP);
 
+	/*
+	 * We need to read back the CMP register to make sure that
+	 * what we wrote hit the chip before we compare it to the
+	 * counter.
+	 */
+	WARN_ON((u32)hpet_readl(HPET_T0_CMP) != cnt);
+
 	return (s32)((u32)hpet_readl(HPET_COUNTER) - cnt) >= 0 ? -ETIME : 0;
 }