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cpufreq: ppc: Fix integer overflow in expression 

On 32-bit, "12 * NSEC_PER_SEC" doesn't fit in "unsigned long"
(NSEC_PER_SEC is a "long" constant), causing an integer overflow:

drivers/cpufreq/ppc-corenet-cpufreq.c: In function 'corenet_cpufreq_cpu_init':
drivers/cpufreq/ppc-corenet-cpufreq.c:211:9: warning: integer overflow in expression [-Woverflow]

Force the intermediate to be 64-bit by adding an "ULL" suffix to the
constant multiplier to fix this.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Geert Uytterhoeven 2014-04-17 11:53:26 +02:00 committed by Rafael J. Wysocki
parent f3cae355a9
commit 1612343a26
1 changed files with 1 additions and 1 deletions
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2
drivers/cpufreq/ppc-corenet-cpufreq.c
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@ -206,7 +206,7 @@ static int corenet_cpufreq_cpu_init(struct cpufreq_policy *policy)
per_cpu(cpu_data, i) = data;
policy->cpuinfo.transition_latency =
(12 * NSEC_PER_SEC) / fsl_get_sys_freq();
(12ULL * NSEC_PER_SEC) / fsl_get_sys_freq();
of_node_put(np);
return 0;