[PATCH 7/11] KVM: Remove redundant check in the kvm_get_dirty_log_protect()

[lantianyu1986]

From: Lan Tianyu <tianyu....@microsoft.com>

The dirty bits have already been checked in the previous check of
"dirty_bitmap" and mask must be non-zero value at this point.

Signed-off-by: Lan Tianyu <tianyu....@microsoft.com>
---
 virt/kvm/kvm_main.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index cf7cc0554094..e75dbb15fd09 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1206,11 +1206,9 @@ 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);
        }
-- 
2.14.4