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authorGeert Uytterhoeven <geert+renesas@glider.be>2014-04-17 11:53:26 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-04-21 23:47:06 +0200
commit1612343a264b2791f4602f4b47dac853e0892ec0 (patch)
treec50fbfee371c65b2cab01a7c6c01309e251eef88
parentf3cae355a962784101478504ef7f6a389ad62979 (diff)
downloadlinux-1612343a264b2791f4602f4b47dac853e0892ec0.tar.bz2
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>
-rw-r--r--drivers/cpufreq/ppc-corenet-cpufreq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/cpufreq/ppc-corenet-cpufreq.c b/drivers/cpufreq/ppc-corenet-cpufreq.c
index b7e677be1df0..a1ca3dd04a8e 100644
--- a/drivers/cpufreq/ppc-corenet-cpufreq.c
+++ b/drivers/cpufreq/ppc-corenet-cpufreq.c
@@ -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;