diff --git a/[refs] b/[refs]
index cd7d783252db..ec966257a624 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: fb7fa8f1741c91f6c6e958762155abe9339476ca
+refs/heads/master: 2608a6584a0a32d3251dfafad31d9f8b2c784466
diff --git a/trunk/include/asm-x86/segment_64.h b/trunk/include/asm-x86/segment_64.h
index 04b8ab21328f..dce742101348 100644
--- a/trunk/include/asm-x86/segment_64.h
+++ b/trunk/include/asm-x86/segment_64.h
@@ -50,4 +50,15 @@
 #define GDT_SIZE (GDT_ENTRIES * 8)
 #define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES * 8) 
 
+/* Bottom two bits of selector give the ring privilege level */
+#define SEGMENT_RPL_MASK	0x3
+/* Bit 2 is table indicator (LDT/GDT) */
+#define SEGMENT_TI_MASK		0x4
+
+/* User mode is privilege level 3 */
+#define USER_RPL		0x3
+/* LDT segment has TI set, GDT has it cleared */
+#define SEGMENT_LDT		0x4
+#define SEGMENT_GDT		0x0
+
 #endif