linux-kernel - [PATCH 3.15-rc3] cpufreq: ppc-corenet-cpufreq: Fix _

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Date:	Mon, 28 Apr 2014 10:18:18 -0600
From:	Tim Gardner <tim.gardner@...onical.com>
To:	cpufreq@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Tim Gardner <tim.gardner@...onical.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Viresh Kumar <viresh.kumar@...aro.org>,
	Zhuoyu Zhang <Zhuoyu.Zhang@...escale.com>
Subject: [PATCH 3.15-rc3] cpufreq: ppc-corenet-cpufreq: Fix __udivdi3 modpost error

bfa709bc823fc32ee8dd5220d1711b46078235d8 (cpufreq: powerpc: add cpufreq
transition latency for FSL e500mc SoCs) introduced a modpost error:

ERROR: "__udivdi3" [drivers/cpufreq/ppc-corenet-cpufreq.ko] undefined!
make[1]: *** [__modpost] Error 1

Fix this by avoiding 64 bit integer division.

gcc version 4.8.2

Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: Viresh Kumar <viresh.kumar@...aro.org>
Cc: Zhuoyu Zhang <Zhuoyu.Zhang@...escale.com>
Signed-off-by: Tim Gardner <tim.gardner@...onical.com>
---
 drivers/cpufreq/ppc-corenet-cpufreq.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/ppc-corenet-cpufreq.c b/drivers/cpufreq/ppc-corenet-cpufreq.c
index a1ca3dd..0af618a 100644
--- a/drivers/cpufreq/ppc-corenet-cpufreq.c
+++ b/drivers/cpufreq/ppc-corenet-cpufreq.c
@@ -138,6 +138,7 @@ static int corenet_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	struct cpufreq_frequency_table *table;
 	struct cpu_data *data;
 	unsigned int cpu = policy->cpu;
+	u64 transition_latency_hz;
 
 	np = of_get_cpu_node(cpu, NULL);
 	if (!np)
@@ -205,8 +206,10 @@ static int corenet_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	for_each_cpu(i, per_cpu(cpu_mask, cpu))
 		per_cpu(cpu_data, i) = data;
 
+	transition_latency_hz = 12ULL * NSEC_PER_SEC;
 	policy->cpuinfo.transition_latency =
-				(12ULL * NSEC_PER_SEC) / fsl_get_sys_freq();
+		do_div(transition_latency_hz, fsl_get_sys_freq());
+
 	of_node_put(np);
 
 	return 0;
-- 
1.7.9.5

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