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authorKarsten Wiese <fzu@wemgehoertderstaat.de>2008-04-07 12:14:45 +0200
committerIngo Molnar <mingo@elte.hu>2008-04-07 21:09:14 +0200
commit4f41c94d5c24e3b3453e9df03c0a80ca1acf00d2 (patch)
tree996302561d3970325980af4a324bfd8440ad5e41 /arch/x86/kernel/tsc_64.c
parent5b13d863573e746739ccfc24ac1a9473cfee8df1 (diff)
x86: fix call to set_cyc2ns_scale() from time_cpufreq_notifier()
In time_cpufreq_notifier() the cpu id to act upon is held in freq->cpu. Use it instead of smp_processor_id() in the call to set_cyc2ns_scale(). This makes the preempt_*able() unnecessary and lets set_cyc2ns_scale() update the intended cpu's cyc2ns. Related mail/thread: http://lkml.org/lkml/2007/12/7/130 Signed-off-by: Karsten Wiese <fzu@wemgehoertderstaat.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/tsc_64.c')
-rw-r--r--arch/x86/kernel/tsc_64.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/kernel/tsc_64.c b/arch/x86/kernel/tsc_64.c
index 947554ddabb..d3bebaaad84 100644
--- a/arch/x86/kernel/tsc_64.c
+++ b/arch/x86/kernel/tsc_64.c
@@ -148,9 +148,7 @@ static int time_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
mark_tsc_unstable("cpufreq changes");
}
- preempt_disable();
- set_cyc2ns_scale(tsc_khz_ref, smp_processor_id());
- preempt_enable();
+ set_cyc2ns_scale(tsc_khz_ref, freq->cpu);
return 0;
}