This patch adds the #ifdef surround.

Signed-off-by: Simon Guo <redacted>
---
 arch/mips/kvm/mips.c       | 2 ++
 arch/powerpc/kvm/powerpc.c | 2 ++
 arch/s390/kvm/kvm-s390.c   | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index 2549fdd..4d593e5 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c

@@ -903,6 +903,7 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 	return r;
 }
 
+#ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
 long kvm_arch_vcpu_async_ioctl(struct file *filp, unsigned int ioctl,
 			       unsigned long arg)
 {

@@ -922,6 +923,7 @@ long kvm_arch_vcpu_async_ioctl(struct file *filp, unsigned int ioctl,
 
 	return -ENOIOCTLCMD;
 }
+#endif
 
 long kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl,
 			 unsigned long arg)

diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 403e642..2adca3c 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c

@@ -1757,6 +1757,7 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 	return -EINVAL;
 }
 
+#ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
 long kvm_arch_vcpu_async_ioctl(struct file *filp,
 			       unsigned int ioctl, unsigned long arg)
 {

@@ -1771,6 +1772,7 @@ long kvm_arch_vcpu_async_ioctl(struct file *filp,
 	}
 	return -ENOIOCTLCMD;
 }
+#endif
 
 long kvm_arch_vcpu_ioctl(struct file *filp,
                          unsigned int ioctl, unsigned long arg)

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 77d7818..c499396 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c

@@ -3784,6 +3784,7 @@ static long kvm_s390_guest_mem_op(struct kvm_vcpu *vcpu,
 	return r;
 }
 
+#ifdef CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL
 long kvm_arch_vcpu_async_ioctl(struct file *filp,
 			       unsigned int ioctl, unsigned long arg)
 {

@@ -3811,6 +3812,7 @@ long kvm_arch_vcpu_async_ioctl(struct file *filp,
 	}
 	return -ENOIOCTLCMD;
 }
+#endif
 
 long kvm_arch_vcpu_ioctl(struct file *filp,
 			 unsigned int ioctl, unsigned long arg)