[PATCH -next] cpufreq: provide cpufreq_get stub

[Randy Dunlap <randy.dunlap@oracle.com>]

From: Randy Dunlap <randy.dunlap@oracle.com>

When CONFIG_CPU_FREQ is disabled, cpufreq_get() needs a stub.
Used by kvm (although it looks like a bit of the kvm code could
be omitted when CONFIG_CPU_FREQ is disabled).

arch/x86/built-in.o: In function `kvm_arch_init':
(.text+0x10de7): undefined reference to `cpufreq_get'
 
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
---
 include/linux/cpufreq.h |    7 +++++++
 1 file changed, 7 insertions(+)

--- linux-next-20091006.orig/include/linux/cpufreq.h
+++ linux-next-20091006/include/linux/cpufreq.h
@@ -291,8 +291,15 @@ struct global_attr {
 int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
 int cpufreq_update_policy(unsigned int cpu);
 
+#ifdef CONFIG_CPU_FREQ
 /* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */
 unsigned int cpufreq_get(unsigned int cpu);
+#else
+static inline unsigned int cpufreq_get(unsigned int cpu)
+{
+	return 0;
+}
+#endif
 
 /* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */
 #ifdef CONFIG_CPU_FREQ
---
~Randy