[PATCH] compat: Backport cpufreq_quick_get_max()

[Ozan Çağlayan <ozancag@xxxxxxxxx>]

This backports:

commit 3d73710880afa3d61cf57b5d4eb192e812eb7e4f
Author: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Date:   Tue Jun 28 10:59:12 2011 -0700

  cpufreq: expose a cpufreq_quick_get_max routine

Trying kernel  3.4.0-030400-generic [OK]
Trying kernel  3.3.7-030307-generic [OK]
Trying kernel  3.2.2-030202-generic [OK]
Trying kernel  3.1.10-030110-generic [OK]
Trying kernel  3.0.18-030018-generic [OK]
Trying kernel  2.6.39-02063904-generic [OK]
Trying kernel  2.6.38-02063808-generic [OK]
Trying kernel  2.6.37-02063706-generic [OK]
Trying kernel  2.6.36-02063604-generic [OK]
Trying kernel  2.6.35-02063512-generic [OK]
Trying kernel  2.6.34-02063410-generic [OK]
Trying kernel  2.6.33-02063305-generic [OK]
Trying kernel  2.6.32-02063255-generic [OK]
Trying kernel  2.6.31-02063113-generic [OK]
Trying kernel  2.6.30-02063010-generic [OK]
Trying kernel  2.6.29-02062906-generic [OK]
Trying kernel  2.6.28-02062810-generic [OK]
Trying kernel  2.6.27-020627-generic [OK]
Trying kernel  2.6.26-020626-generic [OK]
Trying kernel  2.6.25-020625-generic [OK]
Trying kernel  2.6.24-020624-generic [OK]

Signed-off-by: Ozan Çağlayan <ozancag@xxxxxxxxx>
---
 compat/compat-3.1.c        |   24 ++++++++++++++++++++++++
 include/linux/compat-3.1.h |    1 +
 2 files changed, 25 insertions(+)

diff --git a/compat/compat-3.1.c b/compat/compat-3.1.c
index d427dd3..e81a3e7 100644
--- a/compat/compat-3.1.c
+++ b/compat/compat-3.1.c
@@ -9,6 +9,30 @@
  */
 
 #include <linux/idr.h>
+#include <linux/cpufreq.h>
+
+/* This backports:
+ * commit 3d73710880afa3d61cf57b5d4eb192e812eb7e4f
+ * Author: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
+ * Date:   Tue Jun 28 10:59:12 2011 -0700
+ *
+ * 	cpufreq: expose a cpufreq_quick_get_max routine
+ */
+
+unsigned int cpufreq_quick_get_max(unsigned int cpu)
+{
+	struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
+	unsigned int ret_freq = 0;
+
+	if (policy) {
+		ret_freq = policy->max;
+		cpufreq_cpu_put(policy);
+	}
+
+	return ret_freq;
+}
+EXPORT_SYMBOL(cpufreq_quick_get_max);
+
 
 static DEFINE_SPINLOCK(simple_ida_lock);
 
diff --git a/include/linux/compat-3.1.h b/include/linux/compat-3.1.h
index 5998bb1..bf8a4ef 100644
--- a/include/linux/compat-3.1.h
+++ b/include/linux/compat-3.1.h
@@ -102,6 +102,7 @@ int ida_simple_get(struct ida *ida, unsigned int start, unsigned int end,
 		   gfp_t gfp_mask);
 void ida_simple_remove(struct ida *ida, unsigned int id);
 
+unsigned int cpufreq_quick_get_max(unsigned int cpu);
 #endif /* (LINUX_VERSION_CODE < KERNEL_VERSION(3,1,0)) */
 
 #endif /* LINUX_3_1_COMPAT_H */
-- 
1.7.10.4

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