KVM: SVM: Allocate sd->save_area with __GFP_ZERO

And remove clear_page() on it.

Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20211118110814.2568-10-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 7252dc389812fadac806b054c44e472e6ee81f36..581b9dfe63f2997d2a7ea26b891b73e4477adcf2 100644 (file)
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -589,12 +589,10 @@ static int svm_cpu_init(int cpu)
        if (!sd)
                return ret;
        sd->cpu = cpu;
-       sd->save_area = alloc_page(GFP_KERNEL);
+       sd->save_area = alloc_page(GFP_KERNEL | __GFP_ZERO);
        if (!sd->save_area)
                goto free_cpu_data;
 
-       clear_page(page_address(sd->save_area));
-
        ret = sev_cpu_init(sd);
        if (ret)
                goto free_save_area;