[6/7] KVM: Make kvm_mmu_slot_remove_write_access() take mmu_lock by itself

Commit Message

Takuya Yoshikawa Dec. 18, 2012, 7:30 a.m. UTC

Better to place mmu_lock handling and TLB flushing code together since
this is a self-contained function.

Signed-off-by: Takuya Yoshikawa <[e-mail]>
---
 arch/x86/kvm/mmu.c |    3 +++
 arch/x86/kvm/x86.c |    5 +----
 2 files changed, 4 insertions(+), 4 deletions(-)

Patch

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index fc7d84a..b7a1235 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -4199,6 +4199,8 @@  void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot)
 	memslot = id_to_memslot(kvm->memslots, slot);
 	last_gfn = memslot->base_gfn + memslot->npages - 1;
 
+	spin_lock(&kvm->mmu_lock);
+
 	for (i = PT_PAGE_TABLE_LEVEL;
 	     i < PT_PAGE_TABLE_LEVEL + KVM_NR_PAGE_SIZES; ++i) {
 		unsigned long *rmapp;
@@ -4214,6 +4216,7 @@  void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot)
 	}
 
 	kvm_flush_remote_tlbs(kvm);
+	spin_unlock(&kvm->mmu_lock);
 }
 
 void kvm_mmu_zap_all(struct kvm *kvm)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index d9d0f6b..aa183e9 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6900,11 +6900,8 @@  void kvm_arch_commit_memory_region(struct kvm *kvm,
 	 * not be created until the end of the logging.
 	 */
 	if ((mem->flags & KVM_MEM_LOG_DIRTY_PAGES) &&
-	    !(old.flags & KVM_MEM_LOG_DIRTY_PAGES)) {
-		spin_lock(&kvm->mmu_lock);
+	    !(old.flags & KVM_MEM_LOG_DIRTY_PAGES))
 		kvm_mmu_slot_remove_write_access(kvm, mem->slot);
-		spin_unlock(&kvm->mmu_lock);
-	}
 	/*
 	 * If memory slot is created, or moved, we need to clear all
 	 * mmio sptes.