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authorGleb Natapov <gleb@redhat.com>2012-12-24 17:49:30 +0200
committerGleb Natapov <gleb@redhat.com>2012-12-24 17:49:30 +0200
commit7ec4fb44962f611241bcb974fa97c5f49ddcb2f1 (patch)
tree28400ae97788c508e723bc84f2bd6e42e6515815 /virt/kvm/kvm_main.c
parentf924d66d278d5da890f3098805b0450a4ef66c32 (diff)
downloadlinux-linaro-stable-7ec4fb44962f611241bcb974fa97c5f49ddcb2f1.tar.gz
KVM: move the code that installs new slots array to a separate function.
Move repetitive code sequence to a separate function. Reviewed-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 14cbae83be64..e45c20ca422a 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -702,6 +702,17 @@ static int check_memory_region_flags(struct kvm_userspace_memory_region *mem)
return 0;
}
+static struct kvm_memslots *install_new_memslots(struct kvm *kvm,
+ struct kvm_memslots *slots, struct kvm_memory_slot *new)
+{
+ struct kvm_memslots *old_memslots = kvm->memslots;
+
+ update_memslots(slots, new, kvm->memslots->generation);
+ rcu_assign_pointer(kvm->memslots, slots);
+ synchronize_srcu_expedited(&kvm->srcu);
+ return old_memslots;
+}
+
/*
* Allocate some memory and give it an address in the guest physical address
* space.
@@ -820,11 +831,8 @@ int __kvm_set_memory_region(struct kvm *kvm,
slot = id_to_memslot(slots, mem->slot);
slot->flags |= KVM_MEMSLOT_INVALID;
- update_memslots(slots, NULL, kvm->memslots->generation);
+ old_memslots = install_new_memslots(kvm, slots, NULL);
- old_memslots = kvm->memslots;
- rcu_assign_pointer(kvm->memslots, slots);
- synchronize_srcu_expedited(&kvm->srcu);
/* slot was deleted or moved, clear iommu mapping */
kvm_iommu_unmap_pages(kvm, &old);
/* From this point no new shadow pages pointing to a deleted,
@@ -868,10 +876,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
memset(&new.arch, 0, sizeof(new.arch));
}
- update_memslots(slots, &new, kvm->memslots->generation);
- old_memslots = kvm->memslots;
- rcu_assign_pointer(kvm->memslots, slots);
- synchronize_srcu_expedited(&kvm->srcu);
+ old_memslots = install_new_memslots(kvm, slots, &new);
kvm_arch_commit_memory_region(kvm, mem, old, user_alloc);