diff --git a/[refs] b/[refs]
index 5954a1f02128..009b1d5309fc 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5b88abbf770a0e1975c668743100f42934f385e8
+refs/heads/master: d2499d8b6c94df02629631807dd96deae7aa7637
diff --git a/trunk/include/asm-x86/msr-index.h b/trunk/include/asm-x86/msr-index.h
index a4944732be04..4045bbe47379 100644
--- a/trunk/include/asm-x86/msr-index.h
+++ b/trunk/include/asm-x86/msr-index.h
@@ -63,6 +63,13 @@
 #define MSR_IA32_LASTINTFROMIP		0x000001dd
 #define MSR_IA32_LASTINTTOIP		0x000001de
 
+/* DEBUGCTLMSR bits (others vary by model): */
+#define _DEBUGCTLMSR_LBR	0 /* last branch recording */
+#define _DEBUGCTLMSR_BTF	1 /* single-step on branches */
+
+#define DEBUGCTLMSR_LBR		(1UL << _DEBUGCTLMSR_LBR)
+#define DEBUGCTLMSR_BTF		(1UL << _DEBUGCTLMSR_BTF)
+
 #define MSR_IA32_MC0_CTL		0x00000400
 #define MSR_IA32_MC0_STATUS		0x00000401
 #define MSR_IA32_MC0_ADDR		0x00000402