From bf8102228a8bf053051f311e5486042fe0542894 Mon Sep 17 00:00:00 2001
From: Doug Smythies <dsmythies@telus.net>
Date: Fri, 30 May 2014 10:10:57 -0700
Subject: [PATCH] intel_pstate: Improve initial busy calculation

This change makes the busy calculation using 64 bit math which prevents
overflow for large values of aperf/mperf.

Cc: 3.14+ <stable@vger.kernel.org> # 3.14+
Signed-off-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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