KVM: arm64: Switch to use hrtimer_setup()

JIRA: https://issues.redhat.com/browse/RHEL-92805

hrtimer_setup() takes the callback function pointer as argument and
initializes the timer completely.

Replace hrtimer_init() and the open coded initialization of
hrtimer::function with the new setup mechanism.

Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/all/59f527713562ad491df7c216eeee0378e0eb2402.1738746821.git.namcao@linutronix.de

(cherry picked from commit 7e5fd92)
Signed-off-by: Sebastian Ott <sebott@redhat.com>

Author: Sebastian Ott

arch/arm64/kvm/arch_timer.c

@@ -1070,8 +1070,7 @@ static void timer_context_init(struct kvm_vcpu *vcpu, int timerid)
 	else
 		ctxt->offset.vm_offset = &kvm->arch.timer_data.poffset;
 
-	hrtimer_init(&ctxt->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD);
-	ctxt->hrtimer.function = kvm_hrtimer_expire;
+	hrtimer_setup(&ctxt->hrtimer, kvm_hrtimer_expire, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD);
 
 	switch (timerid) {
 	case TIMER_PTIMER:
@@ -1098,8 +1097,8 @@ void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu)
 		timer_set_offset(vcpu_ptimer(vcpu), 0);
 	}
 
-	hrtimer_init(&timer->bg_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_HARD);
-	timer->bg_timer.function = kvm_bg_timer_expire;
+	hrtimer_setup(&timer->bg_timer, kvm_bg_timer_expire, CLOCK_MONOTONIC,
+		      HRTIMER_MODE_ABS_HARD);
 }
 
 void kvm_timer_init_vm(struct kvm *kvm)