From f927da178671a824cf6c530f0623544206387e57 Mon Sep 17 00:00:00 2001 From: Isaku Yamahata Date: Wed, 4 Mar 2009 21:05:40 +0900 Subject: ia64/pv_ops/pv_time_ops: add sched_clock hook. add sched_clock() hook to paravirtualize sched_clock(). ia64 sched_clock() is based on ar.itc which isn't stable on virtualized environment because vcpu may move around on pcpus. So it needs paravirtualization. Signed-off-by: Isaku Yamahata Signed-off-by: Tony Luck --- arch/ia64/kernel/time.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/ia64/kernel/time.c') diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c index f0ebb342409d..c323c7b9c775 100644 --- a/arch/ia64/kernel/time.c +++ b/arch/ia64/kernel/time.c @@ -49,6 +49,15 @@ EXPORT_SYMBOL(last_cli_ip); #endif +#ifdef CONFIG_PARAVIRT +/* We need to define a real function for sched_clock, to override the + weak default version */ +unsigned long long sched_clock(void) +{ + return paravirt_sched_clock(); +} +#endif + #ifdef CONFIG_PARAVIRT static void paravirt_clocksource_resume(void) -- cgit v1.2.3