arm/arm64: KVM: use __GFP_ZERO not memset() to get zeroed pages

Pass __GFP_ZERO to __get_free_pages() instead of calling memset()
explicitly.

Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>

diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index eea0306..8f0c7a4 100644 (file)
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -528,11 +528,10 @@ int kvm_alloc_stage2_pgd(struct kvm *kvm)
                return -EINVAL;
        }
 
-       pgd = (pgd_t *)__get_free_pages(GFP_KERNEL, S2_PGD_ORDER);
+       pgd = (pgd_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, S2_PGD_ORDER);
        if (!pgd)
                return -ENOMEM;
 
-       memset(pgd, 0, PTRS_PER_S2_PGD * sizeof(pgd_t));
        kvm_clean_pgd(pgd);
        kvm->arch.pgd = pgd;