linux-kernel - [PATCH 09/12] KVM: X86/MMU: Unfold struct mmu_page_and_offset in struct kvm_mmu

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Date:   Sun,  5 Jun 2022 14:43:39 +0800
From:   Lai Jiangshan <jiangshanlai@...il.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        Lai Jiangshan <jiangshan.ljs@...group.com>
Subject: [PATCH 09/12] KVM: X86/MMU: Unfold struct mmu_page_and_offset in struct kvm_mmu_pages

From: Lai Jiangshan <jiangshan.ljs@...group.com>

struct kvm_mmu_page *sp is the only field in struct mmu_page_and_offset.

Unfold it.

Signed-off-by: Lai Jiangshan <jiangshan.ljs@...group.com>
---
 arch/x86/kvm/mmu/mmu.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index dc159db46b34..a5563e5ee2e5 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1743,9 +1743,7 @@ static int nonpaging_sync_page(struct kvm_vcpu *vcpu,
 #define KVM_PAGE_ARRAY_NR 16
 
 struct kvm_mmu_pages {
-	struct mmu_page_and_offset {
-		struct kvm_mmu_page *sp;
-	} page[KVM_PAGE_ARRAY_NR];
+	struct kvm_mmu_page *sp[KVM_PAGE_ARRAY_NR];
 	unsigned int nr;
 };
 
@@ -1755,10 +1753,10 @@ static int mmu_pages_add(struct kvm_mmu_pages *pvec, struct kvm_mmu_page *sp)
 
 	if (sp->unsync)
 		for (i=0; i < pvec->nr; i++)
-			if (pvec->page[i].sp == sp)
+			if (pvec->sp[i] == sp)
 				return 0;
 
-	pvec->page[pvec->nr].sp = sp;
+	pvec->sp[pvec->nr] = sp;
 	pvec->nr++;
 	return (pvec->nr == KVM_PAGE_ARRAY_NR);
 }
@@ -1894,7 +1892,7 @@ static bool is_obsolete_sp(struct kvm *kvm, struct kvm_mmu_page *sp)
 
 #define for_each_sp(pvec, sp, i)					\
 		for (i = mmu_pages_first(&pvec);			\
-			i < pvec.nr && ({ sp = pvec.page[i].sp; 1;});	\
+			i < pvec.nr && ({ sp = pvec.sp[i]; 1;});	\
 			i = mmu_pages_next(&pvec, i))
 
 static int mmu_pages_next(struct kvm_mmu_pages *pvec, int i)
@@ -1902,7 +1900,7 @@ static int mmu_pages_next(struct kvm_mmu_pages *pvec, int i)
 	int n;
 
 	for (n = i+1; n < pvec->nr; n++) {
-		struct kvm_mmu_page *sp = pvec->page[n].sp;
+		struct kvm_mmu_page *sp = pvec->sp[n];
 		int level = sp->role.level;
 
 		if (level == PG_LEVEL_4K)
@@ -1921,7 +1919,7 @@ static int mmu_pages_first(struct kvm_mmu_pages *pvec)
 	if (pvec->nr == 0)
 		return 0;
 
-	sp = pvec->page[0].sp;
+	sp = pvec->sp[0];
 	level = sp->role.level;
 	WARN_ON(level == PG_LEVEL_4K);
 
-- 
2.19.1.6.gb485710b