changes needed for ticket locks in dat.h

Reference: /n/atom/patch/applied2013/tikdat
Date: Tue Dec 17 17:37:46 CET 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/k10/dat.h	Tue Dec 17 17:37:34 2013
+++ /sys/src/nix/k10/dat.h	Tue Dec 17 17:37:34 2013
@@ -30,6 +30,21 @@
 /*
  *  machine dependent definitions used by ../port/portdat.h
  */
+#ifdef Tiklock
+enum {
+	Cachelinesz	= 64,
+};
+struct Lock
+{
+	uchar	pad[Cachelinesz*2];
+	Mpl	pl;
+	int	isilock;
+	uintptr	pc;
+	Proc*	p;
+	Mach*	m;
+	uvlong	lockcycles;
+};
+#else
 struct Lock
 {
 	u32int	key;
@@ -40,6 +55,7 @@
 	Mach*	m;
 	uvlong	lockcycles;
 };
+#endif
 
 struct Label
 {