From d91ffee9ec633c6523ef1ea39c36ace578760258 Mon Sep 17 00:00:00 2001
From: Kai Huang <kai.huang@linux.intel.com>
Date: Mon, 12 Jan 2015 15:28:54 +0800
Subject: [PATCH] Optimize TLB flush in kvm_mmu_slot_remove_write_access.

No TLB flush is needed when there's no valid rmap in memory slot.

Signed-off-by: Kai Huang <kai.huang@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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