From: Lai Jiangshan <laijs@linux.alibaba.com>
Date: Thu, 18 Nov 2021 11:08:08 +0000 (+0800)
Subject: KVM: SVM: Allocate sd->save_area with __GFP_ZERO
X-Git-Tag: v5.17-rc1~15^2~132
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=58356767107a6b02c9277810809aca8a36c473d7;p=linux-block.git

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 7252dc389812..581b9dfe63f2 100644
--- 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;