KVM: x86/mmu: fix comment about mmu_unsync_pages_lock
Fix the comment about what can and cannot happen when mmu_unsync_pages_lock is not help. The comment correctly mentions "clearing sp->unsync", but then it talks about unsync going from 0 to 1. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Link: https://lore.kernel.org/r/20231125083400.1399197-5-pbonzini@redhat.com Signed-off-by: Sean Christopherson <seanjc@google.com>
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