+#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal() */
+#define TIF_MEMDIE 16
+#define TIF_DEBUG 17 /* uses debug registers */
+#define TIF_IO_BITMAP 18 /* uses I/O bitmap */
+#define TIF_FREEZE 19 /* is freezing for suspend */
+#define TIF_FORCED_TF 20 /* true if TF in eflags artificially */