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Date: Wed, 13 Jul 2016 15:49:00 +0200
From: Peter Zijlstra <peterz@infradead.org>
To: Nicolai Stange <nicstange@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org,
        Borislav Petkov <bp@suse.de>, Paolo Bonzini <pbonzini@redhat.com>,
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        Len Brown <len.brown@intel.com>,
        "Christopher S. Hall" <christopher.s.hall@intel.com>,
        Adrian Hunter <adrian.hunter@intel.com>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 1/3] arch, x86, tsc deadline clockevent dev: reduce
 frequency roundoff error
Message-ID: <20160713134900.GU30154@twins.programming.kicks-ass.net>
References: <20160713130344.8319-1-nicstange@gmail.com>
 <20160713130344.8319-2-nicstange@gmail.com>
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On Wed, Jul 13, 2016 at 03:03:42PM +0200, Nicolai Stange wrote:

>  		clockevents_config_and_register(levt,
> +						(u32)(((u64)tsc_khz * 1000) /
> +							TSC_DIVISOR),
>  						0xF, ~0UL);

div_u64() perhaps ?