KVM: remove kvm_arch_post_init_vm

The only statement in a kvm_arch_post_init_vm implementation
can be moved into the x86 kvm_arch_init_vm. Do so and remove all
traces from architecture-independent code.

Signed-off-by: Paolo Bonzini <[e-mail]>

arch/x86/kvm/x86.c

···
 			     "does not run without ignore_msrs=1, please report it to [e-mail].\n");
 	}
 
+	once_init(&kvm->arch.nx_once);
 	return 0;
 
 out_uninit_mmu:
···
 	kvm_page_track_cleanup(kvm);
 out:
 	return ret;
-}
-
-int kvm_arch_post_init_vm(struct kvm *kvm)
-{
-	once_init(&kvm->arch.nx_once);
-	return 0;
 }
 
 static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)

include/linux/kvm_host.h

···
 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu);
 bool kvm_arch_dy_has_pending_interrupt(struct kvm_vcpu *vcpu);
 bool kvm_arch_vcpu_preempted_in_kernel(struct kvm_vcpu *vcpu);
-int kvm_arch_post_init_vm(struct kvm *kvm);
 void kvm_arch_pre_destroy_vm(struct kvm *kvm);
 void kvm_arch_create_vm_debugfs(struct kvm *kvm);
 

virt/kvm/kvm_main.c

···
 }
 
 /*
- * Called after the VM is otherwise initialized, but just before adding it to
- * the vm_list.
- */
-int __weak kvm_arch_post_init_vm(struct kvm *kvm)
-{
-	return 0;
-}
-
-/*
  * Called just after removing the VM from the vm_list, but before doing any
  * other destruction.
  */
···
 	if (r)
 		goto out_err_no_debugfs;
 
-	r = kvm_arch_post_init_vm(kvm);
-	if (r)
-		goto out_err;
-
 	mutex_lock(&kvm_lock);
 	list_add(&kvm->vm_list, &vm_list);
 	mutex_unlock(&kvm_lock);
···
 
 	return kvm;
 
-out_err:
-	kvm_destroy_vm_debugfs(kvm);
 out_err_no_debugfs:
 	kvm_coalesced_mmio_free(kvm);
 out_no_coalesced_mmio: