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sched_clock: delay using sched_clock()

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Some arch's can't handle sched_clock() being called too early - delay
this until sched_clock_init() has been called.

Reported-by: Bill Gatliff <bgat@billgatliff.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: Nishanth Aravamudan <nacc@us.ibm.com>
CC: Russell King - ARM Linux <linux@arm.linux.org.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2008-08-11 08:59:03 +02:00
committed by Ingo Molnar
parent 4a273f209c
commit c1955a3d47
2 changed files with 20 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/linux/sched.h
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@ -1551,16 +1551,10 @@ static inline int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask)
extern unsigned long long sched_clock(void);
extern void sched_clock_init(void);
extern u64 sched_clock_cpu(int cpu);
#ifndef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
static inline void sched_clock_init(void)
{
}
static inline u64 sched_clock_cpu(int cpu)
{
return sched_clock();
}
static inline void sched_clock_tick(void)
{
}
@ -1573,8 +1567,6 @@ static inline void sched_clock_idle_wakeup_event(u64 delta_ns)
{
}
#else
extern void sched_clock_init(void);
extern u64 sched_clock_cpu(int cpu);
extern void sched_clock_tick(void);
extern void sched_clock_idle_sleep_event(void);
extern void sched_clock_idle_wakeup_event(u64 delta_ns);