diff --git a/[refs] b/[refs]
index ae835c7d6713..3314b1b0dbc5 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 29552b1462799afbe02af035b243e97579d63350
+refs/heads/master: 9f155b9802bb7049cd0f216c3fe903b58620df11
diff --git a/trunk/arch/i386/kernel/ptrace.c b/trunk/arch/i386/kernel/ptrace.c
index 5ffbb4b7ad05..5c1fb6aada5b 100644
--- a/trunk/arch/i386/kernel/ptrace.c
+++ b/trunk/arch/i386/kernel/ptrace.c
@@ -32,9 +32,12 @@
  * in exit.c or in signal.c.
  */
 
-/* determines which flags the user has access to. */
-/* 1 = access 0 = no access */
-#define FLAG_MASK 0x00044dd5
+/*
+ * Determines which flags the user has access to [1 = access, 0 = no access].
+ * Prohibits changing ID(21), VIP(20), VIF(19), VM(17), IOPL(12-13), IF(9).
+ * Also masks reserved bits (31-22, 15, 5, 3, 1).
+ */
+#define FLAG_MASK 0x00054dd5
 
 /* set's the trap flag. */
 #define TRAP_FLAG 0x100