[PATCH] KVM: explicitly set rmap_head->val to 0 in pte_list_desc_remove_entry()

[linmiaohe]

From: Miaohe Lin <linmiaohe@xxxxxxxxxx>

When we reach here, we have desc->sptes[j] = NULL with j = 0.
So we can replace desc->sptes[0] with 0 to make it more clear.
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
---
 arch/x86/kvm/mmu/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 6f92b40d798c..a81c605abbba 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1410,7 +1410,7 @@ pte_list_desc_remove_entry(struct kvm_rmap_head *rmap_head,
 	if (j != 0)
 		return;
 	if (!prev_desc && !desc->more)
-		rmap_head->val = (unsigned long)desc->sptes[0];
+		rmap_head->val = 0;
 	else
 		if (prev_desc)
 			prev_desc->more = desc->more;
-- 
2.19.1