linux-kernel - [PATCH] KVM: x86/mmu: Remove unused "pfn" in kvm_mmu_zap_collapsible

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Message-Id: <20220727201029.2758052-1-seanjc@google.com>
Date:   Wed, 27 Jul 2022 20:10:29 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] KVM: x86/mmu: Remove unused "pfn" in kvm_mmu_zap_collapsible_spte()

Remove kvm_mmu_zap_collapsible_spte()'s local "pfn" variable, which is
set but not used now that kvm_mmu_max_mapping_level() doesn't require a
pfn.

No functional change intended.

Fixes: fe631a464094 ("KVM: x86/mmu: Don't require refcounted "struct page" to create huge SPTEs")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/mmu/mmu.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 8e477333a263..c1cba921c091 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -6416,13 +6416,11 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm,
 	u64 *sptep;
 	struct rmap_iterator iter;
 	int need_tlb_flush = 0;
-	kvm_pfn_t pfn;
 	struct kvm_mmu_page *sp;
 
 restart:
 	for_each_rmap_spte(rmap_head, &iter, sptep) {
 		sp = sptep_to_sp(sptep);
-		pfn = spte_to_pfn(*sptep);
 
 		/*
 		 * We cannot do huge page mapping for indirect shadow pages,

base-commit: 1a4d88a361af4f2e91861d632c6a1fe87a9665c2
-- 
2.37.1.359.gd136c6c3e2-goog