kvmclock: Unexport kvmclock clocksource

The KVM PTP driver now refers to the clocksource ID CSID_X86_KVM_CLK, not
to the clocksource itself any more. There are no remaining users of the
clocksource export.

Therefore, make the clocksource static again.

Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240201010453.2212371-9-peter.hilber@opensynergy.com

Author: peter-hilber-at-opensynergy-dot-com

arch/x86/include/asm/kvmclock.h

@@ -4,8 +4,6 @@
 
 #include <linux/percpu.h>
 
-extern struct clocksource kvm_clock;
-
 DECLARE_PER_CPU(struct pvclock_vsyscall_time_info *, hv_clock_per_cpu);
 
 static __always_inline struct pvclock_vcpu_time_info *this_cpu_pvti(void)

arch/x86/kernel/kvmclock.c

@@ -154,7 +154,7 @@ static int kvm_cs_enable(struct clocksource *cs)
 	return 0;
 }
 
-struct clocksource kvm_clock = {
+static struct clocksource kvm_clock = {
 	.name	= "kvm-clock",
 	.read	= kvm_clock_get_cycles,
 	.rating	= 400,
@@ -163,7 +163,6 @@ struct clocksource kvm_clock = {
 	.id     = CSID_X86_KVM_CLK,
 	.enable	= kvm_cs_enable,
 };
-EXPORT_SYMBOL_GPL(kvm_clock);
 
 static void kvm_register_clock(char *txt)
 {