Re: [PATCH v2] MIPS: Add a high resolution sched_clock() via cnt32_to_63().

From: Sergei Shtylyov
Date: Sun Nov 22 2009 - 06:51:47 EST


Hello.

Ingo Molnar wrote:

+config HR_SCHED_CLOCK
+ bool "High Resolution sched_clock()"
+ depends on CSRC_R4K
+ default n
+ help
+ This option enables the MIPS c0 count based high resolution
+ sched_clock().
+
+ If you need a ns precision timestamp, You are recommended to enable
+ this option. For example, If you are using the Ftrace subsystem to do

s/If/if/

diff --git a/arch/mips/kernel/csrc-r4k.c b/arch/mips/kernel/csrc-r4k.c
index e95a3cd..4e52cca 100644
--- a/arch/mips/kernel/csrc-r4k.c
+++ b/arch/mips/kernel/csrc-r4k.c
@@ -6,10 +6,64 @@
* Copyright (C) 2007 by Ralf Baechle
*/
#include <linux/clocksource.h>
+#include <linux/cnt32_to_63.h>
+#include <linux/timer.h>
#include <linux/init.h>
#include <asm/time.h>
+/*
+ * MIPS' sched_clock implementation.

s/MIPS'/MIPS's

MIPS's is not really a proper English. :-)

WBR, Sergei


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