[PATCH] KVM: x86: pvec always has more than 1 sp

[Wei Yang <richard.weiyang@xxxxxxxxx>]

Here is the code flow related to mmu_pages_first():

    mmu_unsync_walk()
        mmu_pages_add()
	__mmu_unsync_walk()
    for_each_sp()
        mmu_pages_first()

Every time when mmu_pages_first() is invoked, pvec is prepared by
mmu_unsync_walk() which insert at least one sp in pvec.

This patch removes the check on pvec->nr since this doesn't happen.

Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxx>
---
 arch/x86/kvm/mmu.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 899c029cff0d..0caaaa25e88b 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2267,9 +2267,6 @@ static int mmu_pages_first(struct kvm_mmu_pages *pvec,
 	struct kvm_mmu_page *sp;
 	int level;
 
-	if (pvec->nr == 0)
-		return 0;
-
 	WARN_ON(pvec->page[0].idx != INVALID_INDEX);
 
 	sp = pvec->page[0].sp;
-- 
2.15.1