KVM: x86: hyper-v: Stop shadowing global 'current_vcpu' variable

'current_vcpu' variable in KVM is a per-cpu pointer to the currently
scheduled vcpu. kvm_hv_flush_tlb()/kvm_hv_send_ipi() functions used
to have local 'vcpu' variable to iterate over vCPUs but it's gone
now and there's no need to use anything but the standard 'vcpu' as
an argument.
Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210126134816.1880136-10-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/hyperv.c

@@ -1509,11 +1509,10 @@ static __always_inline unsigned long *sparse_set_to_vcpu_mask(
 	return vcpu_bitmap;
 }
 
-static u64 kvm_hv_flush_tlb(struct kvm_vcpu *current_vcpu, u64 ingpa,
-			    u16 rep_cnt, bool ex)
+static u64 kvm_hv_flush_tlb(struct kvm_vcpu *vcpu, u64 ingpa, u16 rep_cnt, bool ex)
 {
-	struct kvm *kvm = current_vcpu->kvm;
-	struct kvm_vcpu_hv *hv_vcpu = &current_vcpu->arch.hyperv;
+	struct kvm *kvm = vcpu->kvm;
+	struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
 	struct hv_tlb_flush_ex flush_ex;
 	struct hv_tlb_flush flush;
 	u64 vp_bitmap[KVM_HV_MAX_SPARSE_VCPU_SET_BITS];
@@ -1611,10 +1610,10 @@ static void kvm_send_ipi_to_many(struct kvm *kvm, u32 vector,
 	}
 }
 
-static u64 kvm_hv_send_ipi(struct kvm_vcpu *current_vcpu, u64 ingpa, u64 outgpa,
+static u64 kvm_hv_send_ipi(struct kvm_vcpu *vcpu, u64 ingpa, u64 outgpa,
 			   bool ex, bool fast)
 {
-	struct kvm *kvm = current_vcpu->kvm;
+	struct kvm *kvm = vcpu->kvm;
 	struct hv_send_ipi_ex send_ipi_ex;
 	struct hv_send_ipi send_ipi;
 	u64 vp_bitmap[KVM_HV_MAX_SPARSE_VCPU_SET_BITS];