x86: kvm_hv_set_msr(): use __put_user() instead of 32bit __clear_user()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index bcefa9d..b85b211 100644 (file)
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1129,7 +1129,7 @@ static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
                 * only, there can be valuable data in the rest which needs
                 * to be preserved e.g. on migration.
                 */
-               if (__clear_user((void __user *)addr, sizeof(u32)))
+               if (__put_user(0, (u32 __user *)addr))
                        return 1;
                hv_vcpu->hv_vapic = data;
                kvm_vcpu_mark_page_dirty(vcpu, gfn);