linux-kernel - Re: [PATCH V2 1/1] X86: Hyper-V: Get the local APIC timer frequency from the hypervisor

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Date:	Fri, 27 Sep 2013 17:32:43 +0200
From:	Olaf Hering <olaf@...fle.de>
To:	KY Srinivasan <kys@...rosoft.com>
Cc:	"x86@...nel.org" <x86@...nel.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"apw@...onical.com" <apw@...onical.com>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"hpa@...or.com" <hpa@...or.com>,
	"JBeulich@...e.com" <JBeulich@...e.com>,
	"bp@...en8.de" <bp@...en8.de>
Subject: Re: [PATCH V2 1/1] X86: Hyper-V: Get the local APIC timer frequency
 from the hypervisor

On Fri, Sep 27, KY Srinivasan wrote:

> > This leads to build errors on 32bit:
> > 
> > linux-3.12-rc2/arch/x86/kernel/cpu/mshyperv.c:88: undefined reference to
> > `__udivdi3'
> > 
> > Up to now I have only tested on 64bit, sorry for that.
> 
> Thanks Olaf. I am travelling currently; I will fix it when I get back (early next week).

This change seems to fix it:

-+              hv_lapic_frequency /= HZ;
++              div_u64(hv_lapic_frequency, HZ);

Olaf
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