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

Mathieu Desnoyers
2008-10-17T00:05:03Z

[-- Attachment #1: get-cycles-sparc64-have-get-cycles.patch --]
[-- Type: text/plain, Size: 2084 bytes --]

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

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
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 <a.p.zijlstra@chello.nl>
CC: Thomas Gleixner <tglx@linutronix.de>
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