From a303def0fc18f0f2393b5c5f8ae3d2657a9713dc Mon Sep 17 00:00:00 2001 From: Lai Jiangshan Date: Wed, 7 Dec 2022 20:06:16 +0800 Subject: [PATCH] kvm: Remove the unused macro KVM_MMU_READ_{,UN}LOCK() No code is using KVM_MMU_READ_LOCK() or KVM_MMU_READ_UNLOCK(). They used to be in virt/kvm/pfncache.c: KVM_MMU_READ_LOCK(kvm); retry = mmu_notifier_retry_hva(kvm, mmu_seq, uhva); KVM_MMU_READ_UNLOCK(kvm); However, since 58cd407ca4c6 ("KVM: Fix multiple races in gfn=>pfn cache refresh", 2022-05-25) the code is only relying on the MMU notifier's invalidation count and sequence number. Signed-off-by: Lai Jiangshan Message-Id: <20221207120617.9409-1-jiangshanlai@gmail.com> Signed-off-by: Paolo Bonzini --- virt/kvm/kvm_mm.h | 4 ---- 1 file changed, 4 deletions(-) diff --git a/virt/kvm/kvm_mm.h b/virt/kvm/kvm_mm.h index a1ab15006af3..180f1a09e6ba 100644 --- a/virt/kvm/kvm_mm.h +++ b/virt/kvm/kvm_mm.h @@ -14,14 +14,10 @@ #define KVM_MMU_LOCK_INIT(kvm) rwlock_init(&(kvm)->mmu_lock) #define KVM_MMU_LOCK(kvm) write_lock(&(kvm)->mmu_lock) #define KVM_MMU_UNLOCK(kvm) write_unlock(&(kvm)->mmu_lock) -#define KVM_MMU_READ_LOCK(kvm) read_lock(&(kvm)->mmu_lock) -#define KVM_MMU_READ_UNLOCK(kvm) read_unlock(&(kvm)->mmu_lock) #else #define KVM_MMU_LOCK_INIT(kvm) spin_lock_init(&(kvm)->mmu_lock) #define KVM_MMU_LOCK(kvm) spin_lock(&(kvm)->mmu_lock) #define KVM_MMU_UNLOCK(kvm) spin_unlock(&(kvm)->mmu_lock) -#define KVM_MMU_READ_LOCK(kvm) spin_lock(&(kvm)->mmu_lock) -#define KVM_MMU_READ_UNLOCK(kvm) spin_unlock(&(kvm)->mmu_lock) #endif /* KVM_HAVE_MMU_RWLOCK */ kvm_pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool interruptible,