[RFC patch 03/15] get_cycles() : sparc64 HAVE_GET_CYCLES

This patch selects HAVE_GET_CYCLES and makes sure get_cycles_barrier() and
get_cycles_rate() are implemented.

Signed-off-by: Mathieu Desnoyers <redacted>
CC: David Miller <davem@davemloft.net>
CC: Linus Torvalds <torvalds@linux-foundation.org>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Ingo Molnar <mingo@redhat.com>
CC: Peter Zijlstra <redacted>
CC: Thomas Gleixner <redacted>
CC: Steven Rostedt <rostedt@goodmis.org>
CC: linux-arch@vger.kernel.org
---
 arch/sparc/include/asm/timex_64.h |   17 ++++++++++++++++-
 arch/sparc64/Kconfig              |    1 +
 2 files changed, 17 insertions(+), 1 deletion(-)

Index: linux-2.6-lttng/arch/sparc64/Kconfig
===================================================================

--- linux-2.6-lttng.orig/arch/sparc64/Kconfig	2008-10-16 13:07:04.000000000 -0400
+++ linux-2.6-lttng/arch/sparc64/Kconfig	2008-10-16 18:14:45.000000000 -0400

@@ -14,6 +14,7 @@ config SPARC64
 	select HAVE_DYNAMIC_FTRACE
 	select HAVE_FTRACE
 	select HAVE_IDE
+	select HAVE_GET_CYCLES
 	select HAVE_LMB
 	select HAVE_ARCH_KGDB
 	select USE_GENERIC_SMP_HELPERS if SMP

Index: linux-2.6-lttng/arch/sparc/include/asm/timex_64.h
===================================================================

--- linux-2.6-lttng.orig/arch/sparc/include/asm/timex_64.h	2008-10-16 13:07:04.000000000 -0400
+++ linux-2.6-lttng/arch/sparc/include/asm/timex_64.h	2008-10-16 18:14:25.000000000 -0400

@@ -12,7 +12,22 @@
 
 /* Getting on the cycle counter on sparc64. */
 typedef unsigned long cycles_t;
-#define get_cycles()	tick_ops->get_tick()
+
+static inline cycles_t get_cycles(void)
+{
+	return tick_ops->get_tick();
+}
+
+/* get_cycles instruction is synchronized on sparc64 */
+static inline void get_cycles_barrier(void)
+{
+	return;
+}
+
+static inline cycles_t get_cycles_rate(void)
+{
+	return CLOCK_TICK_RATE;
+}
 
 #define ARCH_HAS_READ_CURRENT_TIMER
 

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68