KVM: use __copy_to_user/__clear_user to write guest page

Simply use __copy_to_user/__clear_user to write guest page since we have
already verified the user address when the memslot is set

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 51df0b6c891a..0b089860e950 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1388,7 +1388,7 @@ static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
                         return 1;
                 kvm_x86_ops->patch_hypercall(vcpu, instructions);
                 ((unsigned char *)instructions)[3] = 0xc3; /* ret */
-                if (copy_to_user((void __user *)addr, instructions, 4))
+                if (__copy_to_user((void __user *)addr, instructions, 4))
                         return 1;
                 kvm->arch.hv_hypercall = data;
                 break;
@@ -1415,7 +1415,7 @@ static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
                                   HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT);
                 if (kvm_is_error_hva(addr))
                         return 1;
-                if (clear_user((void __user *)addr, PAGE_SIZE))
+                if (__clear_user((void __user *)addr, PAGE_SIZE))
                         return 1;
                 vcpu->arch.hv_vapic = data;
                 break;