From: Lan Tianyu <Tianyu.Lan@microsoft.com>
Date: Sat, 2 Feb 2019 09:20:27 +0000 (+0800)
Subject: Revert "KVM: Eliminate extra function calls in kvm_get_dirty_log_protect()"
X-Git-Tag: v5.15~6755^2~9
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a67794cafbc4594debf53dbe4e2a7708426f492e;p=platform%2Fkernel%2Flinux-starfive.git

Revert "KVM: Eliminate extra function calls in kvm_get_dirty_log_protect()"

The value of "dirty_bitmap[i]" is already check before setting its value
to mask. The following check of "mask" is redundant. The check of "mask" was
introduced by commit 58d2930f4ee3 ("KVM: Eliminate extra function calls in
kvm_get_dirty_log_protect()"), revert it.

Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 5087cf7..276af92a 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1205,11 +1205,9 @@ int kvm_get_dirty_log_protect(struct kvm *kvm,
 			mask = xchg(&dirty_bitmap[i], 0);
 			dirty_bitmap_buffer[i] = mask;
 
-			if (mask) {
-				offset = i * BITS_PER_LONG;
-				kvm_arch_mmu_enable_log_dirty_pt_masked(kvm, memslot,
-									offset, mask);
-			}
+			offset = i * BITS_PER_LONG;
+			kvm_arch_mmu_enable_log_dirty_pt_masked(kvm, memslot,
+								offset, mask);
 		}
 		spin_unlock(&kvm->mmu_lock);
 	}