cpufreq: demand load governor modules

Demand-load cpufreq governor modules if needed.

---
drivers/cpufreq/cpufreq.c | 17 +++++++++++++++++

1 file changed, 17 insertions(+)

diff -r 4650553b3f11 drivers/cpufreq/cpufreq.c
@@ -320,6 +320,23 @@ static int cpufreq_parse_governor (char 

		mutex_lock(&cpufreq_governor_mutex);

		t = __find_governor(str_governor);

+
+ if (t == NULL) {
+ char *name = kasprintf(GFP_KERNEL, "cpufreq_%s", str_governor);
+
+ if (name) {
+ int ret;
+
+ mutex_unlock(&cpufreq_governor_mutex);
+ ret = request_module(name);
+ mutex_lock(&cpufreq_governor_mutex);
+
+ if (ret == 0)
+ t = __find_governor(str_governor);
+ }
+
+ kfree(name);
+ }

		if (t != NULL) {
			*governor = t;