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>

arch/x86/kernel/paravirt.c

@@ -285,7 +285,7 @@ struct pv_time_ops pv_time_ops = {
 	.get_wallclock = native_get_wallclock,
 	.set_wallclock = native_set_wallclock,
 	.sched_clock = native_sched_clock,
-	.get_cpu_khz = native_calculate_cpu_khz,
+	.get_tsc_khz = native_calibrate_tsc,
 };
 
 struct pv_irq_ops pv_irq_ops = {

arch/x86/kernel/tsc.c

@@ -123,9 +123,9 @@ static u64 __init tsc_read_refs(u64 *pm, u64 *hpet)
 }
 
 /**
- * tsc_calibrate - calibrate the tsc on boot
+ * native_calibrate_tsc - calibrate the tsc on boot
  */
-static unsigned int __init tsc_calibrate(void)
+unsigned long native_calibrate_tsc(void)
 {
 	unsigned long flags;
 	u64 tsc1, tsc2, tr1, tr2, delta, pm1, pm2, hpet1, hpet2;
@@ -195,10 +195,6 @@ static unsigned int __init tsc_calibrate(void)
 	return tsc_khz_val;
 }
 
-unsigned long native_calculate_cpu_khz(void)
-{
-	return tsc_calibrate();
-}
 
 #ifdef CONFIG_X86_32
 /* Only called from the Powernow K7 cpu freq driver */
@@ -208,8 +204,8 @@ int recalibrate_cpu_khz(void)
 	unsigned long cpu_khz_old = cpu_khz;
 
 	if (cpu_has_tsc) {
-		cpu_khz = calculate_cpu_khz();
-		tsc_khz = cpu_khz;
+		tsc_khz = calibrate_tsc();
+		cpu_khz = tsc_khz;
 		cpu_data(0).loops_per_jiffy =
 			cpufreq_scale(cpu_data(0).loops_per_jiffy,
 					cpu_khz_old, cpu_khz);
@@ -487,10 +483,10 @@ void __init tsc_init(void)
 	if (!cpu_has_tsc)
 		return;
 
-	cpu_khz = calculate_cpu_khz();
-	tsc_khz = cpu_khz;
+	tsc_khz = calibrate_tsc();
+	cpu_khz = tsc_khz;
 
-	if (!cpu_khz) {
+	if (!tsc_khz) {
 		mark_tsc_unstable("could not calculate TSC khz");
 		return;
 	}

arch/x86/kernel/vmi_32.c

@@ -932,7 +932,7 @@ static inline int __init activate_vmi(void)
 		pv_apic_ops.setup_secondary_clock = vmi_time_ap_init;
 #endif
 		pv_time_ops.sched_clock = vmi_sched_clock;
- 		pv_time_ops.get_cpu_khz = vmi_cpu_khz;
+		pv_time_ops.get_tsc_khz = vmi_tsc_khz;
 
 		/* We have true wallclock functions; disable CMOS clock sync */
 		no_sync_cmos_clock = 1;

arch/x86/kernel/vmiclock_32.c

@@ -69,8 +69,8 @@ unsigned long long vmi_sched_clock(void)
 	return cycles_2_ns(vmi_timer_ops.get_cycle_counter(VMI_CYCLES_AVAILABLE));
 }
 
-/* paravirt_ops.get_cpu_khz = vmi_cpu_khz */
-unsigned long vmi_cpu_khz(void)
+/* paravirt_ops.get_tsc_khz = vmi_tsc_khz */
+unsigned long vmi_tsc_khz(void)
 {
 	unsigned long long khz;
 	khz = vmi_timer_ops.get_cycle_frequency();

arch/x86/lguest/boot.c

@@ -607,7 +607,7 @@ static unsigned long lguest_get_wallclock(void)
  * what speed it runs at, or 0 if it's unusable as a reliable clock source.
  * This matches what we want here: if we return 0 from this function, the x86
  * TSC clock will give up and not register itself. */
-static unsigned long lguest_cpu_khz(void)
+static unsigned long lguest_tsc_khz(void)
 {
 	return lguest_data.tsc_khz;
 }
@@ -998,7 +998,7 @@ __init void lguest_init(void)
 	/* time operations */
 	pv_time_ops.get_wallclock = lguest_get_wallclock;
 	pv_time_ops.time_init = lguest_time_init;
-	pv_time_ops.get_cpu_khz = lguest_cpu_khz;
+	pv_time_ops.get_tsc_khz = lguest_tsc_khz;
 
 	/* Now is a good time to look at the implementations of these functions
 	 * before returning to the rest of lguest_init(). */

arch/x86/xen/enlighten.c

@@ -1062,7 +1062,7 @@ static const struct pv_time_ops xen_time_ops __initdata = {
 
 	.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,
 };
 

arch/x86/xen/time.c

@@ -197,8 +197,8 @@ unsigned long long xen_sched_clock(void)
 }
 
 
-/* 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 =

arch/x86/xen/xen-ops.h

@@ -32,7 +32,7 @@ void __init xen_build_dynamic_phys_to_machine(void);
 
 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);

include/asm-x86/paravirt.h

@@ -84,7 +84,7 @@ struct pv_time_ops {
 	int (*set_wallclock)(unsigned long);
 
 	unsigned long long (*sched_clock)(void);
-	unsigned long (*get_cpu_khz)(void);
+	unsigned long (*get_tsc_khz)(void);
 };
 
 struct pv_cpu_ops {
@@ -779,7 +779,7 @@ static inline unsigned long long paravirt_sched_clock(void)
 {
 	return PVOP_CALL0(unsigned long long, pv_time_ops.sched_clock);
 }
-#define calculate_cpu_khz() (pv_time_ops.get_cpu_khz())
+#define calibrate_tsc() (pv_time_ops.get_tsc_khz())
 
 static inline unsigned long long paravirt_read_pmc(int counter)
 {

include/asm-x86/timer.h

@@ -7,14 +7,14 @@
 #define TICK_SIZE (tick_nsec / 1000)
 
 unsigned long long native_sched_clock(void);
-unsigned long native_calculate_cpu_khz(void);
+unsigned long native_calibrate_tsc(void);
 
 extern int timer_ack;
 extern int no_timer_check;
 extern int recalibrate_cpu_khz(void);
 
 #ifndef CONFIG_PARAVIRT
-#define calculate_cpu_khz() native_calculate_cpu_khz()
+#define calibrate_tsc() native_calibrate_tsc()
 #endif
 
 /* Accelerators for sched_clock()

include/asm-x86/vmi_time.h

@@ -50,7 +50,7 @@ extern void __init vmi_time_init(void);
 extern unsigned long vmi_get_wallclock(void);
 extern int vmi_set_wallclock(unsigned long now);
 extern unsigned long long vmi_sched_clock(void);
-extern unsigned long vmi_cpu_khz(void);
+extern unsigned long vmi_tsc_khz(void);
 
 #ifdef CONFIG_X86_LOCAL_APIC
 extern void __devinit vmi_time_bsp_init(void);