Re: [tip:x86/tsc] x86: Improve TSC calibration using a delayedworkqueue

[Thomas Gleixner]

On Tue, 11 Jan 2011, Kirill A. Shutemov wrote:
> On Tue, Jan 11, 2011 at 09:37:15AM +0100, Thomas Gleixner wrote:
> > Does the patch below fix it ? We can end up with tsc_khz=0 there :(
> 
> Yes, it does.
> 
> Bisected-and-tested-by: Kirill A. Shutemov <kas@xxxxxxxxxx>

Looking deeper, we should avoid to schedule the delayed init
completely. Does that work as well ?

Thanks,

	tglx
---

diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 03d2ea8..823f79a 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -965,7 +965,7 @@ out:
 
 static int __init init_tsc_clocksource(void)
 {
-	if (!cpu_has_tsc || tsc_disabled > 0)
+	if (!cpu_has_tsc || tsc_disabled > 0 || !tsc_khz)
 		return 0;
 
 	if (tsc_clocksource_reliable)
--
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