From: Andrew Morton <akpm@linux-foundation.org>

arch/x86_64/kernel/built-in.o: In function `resync_freq':
sched-clock.c:(.text+0x97f3): undefined reference to `cpufreq_get'

Cc: Andi Kleen <ak@suse.de>
Cc: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/cpufreq.h |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff -puN include/linux/cpufreq.h~fix-x86_64-mm-sched-clock-share include/linux/cpufreq.h
--- a/include/linux/cpufreq.h~fix-x86_64-mm-sched-clock-share
+++ a/include/linux/cpufreq.h
@@ -275,13 +275,19 @@ struct freq_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);
 
-/* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */
-#ifdef CONFIG_CPU_FREQ
+/*
+ * query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it
+ */
 unsigned int cpufreq_quick_get(unsigned int cpu);
 #else
+static inline unsigned int cpufreq_get(unsigned int cpu)
+{
+	return 0;
+}
 static inline unsigned int cpufreq_quick_get(unsigned int cpu)
 {
 	return 0;
_