[RFC patch 04/18] get_cycles() : powerpc64 HAVE_GET_CYCLES

Mathieu Desnoyers
2008-11-07T05:44:41Z

[-- Attachment #1: get-cycles-powerpc-have-get-cycles.patch --]
[-- Type: text/plain, Size: 1979 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: benh@kernel.crashing.org
CC: paulus@samba.org
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/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/timex.h | 11 +++++++++++
2 files changed, 12 insertions(+)

Index: linux.trees.git/arch/powerpc/Kconfig
===================================================================
--- linux.trees.git.orig/arch/powerpc/Kconfig 2008-11-07 00:09:44.000000000 -0500
+++ linux.trees.git/arch/powerpc/Kconfig 2008-11-07 00:09:46.000000000 -0500
@@ -121,6 +121,7 @@ config PPC
select HAVE_DMA_ATTRS if PPC64
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_OPROFILE
+ select HAVE_GET_CYCLES if PPC64

config EARLY_PRINTK
bool
Index: linux.trees.git/arch/powerpc/include/asm/timex.h
===================================================================
--- linux.trees.git.orig/arch/powerpc/include/asm/timex.h 2008-11-07 00:09:44.000000000 -0500
+++ linux.trees.git/arch/powerpc/include/asm/timex.h 2008-11-07 00:09:46.000000000 -0500
@@ -7,6 +7,7 @@
* PowerPC architecture timex specifications
*/

+#include <linux/time.h>
#include <asm/cputable.h>
#include <asm/reg.h>

@@ -46,5 +47,15 @@ static inline cycles_t get_cycles(void)
#endif
}

+static inline cycles_t get_cycles_rate(void)
+{
+ return tb_ticks_per_sec;
+}
+
+static inline void get_cycles_barrier(void)
+{
+ isync();
+}
+
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_TIMEX_H */

--
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68