[SPARC64]: Use tick_ops for get_cycles, export it.

arch/sparc64/kernel/sparc64_ksyms.c

@@ -380,3 +380,5 @@ EXPORT_SYMBOL(ns87303_lock);
 
 /* for solaris compat module */
 EXPORT_SYMBOL_GPL(sys_call_table);
+
+EXPORT_SYMBOL(tick_ops);

include/asm-sparc64/timex.h

@@ -6,6 +6,8 @@
 #ifndef _ASMsparc64_TIMEX_H
 #define _ASMsparc64_TIMEX_H
 
+#include <asm/timer.h>
+
 #define CLOCK_TICK_RATE	1193180 /* Underlying HZ */
 #define CLOCK_TICK_FACTOR	20	/* Factor of both 1000000 and CLOCK_TICK_RATE */
 #define FINETUNE ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * \
@@ -14,10 +16,6 @@
 
 /* Getting on the cycle counter on sparc64. */
 typedef unsigned long cycles_t;
-#define get_cycles() \
-({	cycles_t ret; \
-	__asm__ __volatile__("rd	%%tick, %0" : "=r" (ret)); \
-	ret; \
-})
+#define get_cycles()	tick_ops->get_tick()
 
 #endif