x86: rename paravirtualized TSC functions

Rename the paravirtualized calculate_cpu_khz to calibrate_tsc.
In all cases, we actually calibrate_tsc and use that as the cpu_khz value.

Signed-off-by: Alok N Kataria <akataria@vmware.com>
Signed-off-by: Dan Hecht <dhecht@vmware.com>
Cc: Dan Hecht <dhecht@vmware.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 3b98083..dcd4e51 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1062,7 +1062,7 @@
 
 	.set_wallclock = xen_set_wallclock,
 	.get_wallclock = xen_get_wallclock,
-	.get_cpu_khz = xen_cpu_khz,
+	.get_tsc_khz = xen_tsc_khz,
 	.sched_clock = xen_sched_clock,
 };
 
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index 64f0038..685b774 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -197,8 +197,8 @@
 }
 
 
-/* Get the CPU speed from Xen */
-unsigned long xen_cpu_khz(void)
+/* Get the TSC speed from Xen */
+unsigned long xen_tsc_khz(void)
 {
 	u64 xen_khz = 1000000ULL << 32;
 	const struct pvclock_vcpu_time_info *info =
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 9a05559..d852ddb 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -32,7 +32,7 @@
 
 void xen_setup_timer(int cpu);
 void xen_setup_cpu_clockevents(void);
-unsigned long xen_cpu_khz(void);
+unsigned long xen_tsc_khz(void);
 void __init xen_time_init(void);
 unsigned long xen_get_wallclock(void);
 int xen_set_wallclock(unsigned long time);