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

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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>
This commit is contained in:
Lan Tianyu 2019-02-02 17:20:27 +08:00 committed by Paolo Bonzini
parent 7539b174ae
commit a67794cafb
1 changed files with 3 additions and 5 deletions
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8
virt/kvm/kvm_main.c
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@ -1205,11 +1205,9 @@ int kvm_get_dirty_log_protect(struct kvm *kvm,
mask = xchg(&dirty_bitmap[i], 0); mask = xchg(&dirty_bitmap[i], 0);
dirty_bitmap_buffer[i] = mask; dirty_bitmap_buffer[i] = mask;
if (mask) { offset = i * BITS_PER_LONG;
offset = i * BITS_PER_LONG; kvm_arch_mmu_enable_log_dirty_pt_masked(kvm, memslot,
kvm_arch_mmu_enable_log_dirty_pt_masked(kvm, memslot, offset, mask);
offset, mask);
}
} }
spin_unlock(&kvm->mmu_lock); spin_unlock(&kvm->mmu_lock);
} }