KVM: SVM: Remove unnecessary GFP_KERNEL_ACCOUNT in svm_set_nested_state()

The fixed size temporary variables vmcb_control_area and vmcb_save_area
allocated in svm_set_nested_state() are released when the function exits.
Meanwhile, svm_set_nested_state() also have vcpu mutex held to avoid
massive concurrency allocation, so we don't need to set GFP_KERNEL_ACCOUNT.

Signed-off-by: Yongqiang Liu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Sean Christopherson <[email protected]>

Author: Yongqiang Liu

arch/x86/kvm/svm/nested.c

@@ -1693,8 +1693,8 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu,
 		return -EINVAL;
 
 	ret  = -ENOMEM;
-	ctl  = kzalloc(sizeof(*ctl),  GFP_KERNEL_ACCOUNT);
-	save = kzalloc(sizeof(*save), GFP_KERNEL_ACCOUNT);
+	ctl  = kzalloc(sizeof(*ctl),  GFP_KERNEL);
+	save = kzalloc(sizeof(*save), GFP_KERNEL);
 	if (!ctl || !save)
 		goto out_free;