kvm/eventfd: move wildcard calculation outside loop

There is no need to calculate wildcard in each iteration since wildcard is not changed. Signed-off-by: Yi Li <[email protected]> Message-Id: <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
jangid · Sep 28, 2020 · 2fc4f15 · 2fc4f15
1 parent b9757a4
commit 2fc4f15
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
@@ -853,15 +853,17 @@ kvm_deassign_ioeventfd_idx(struct kvm *kvm, enum kvm_bus bus_idx,
 	struct eventfd_ctx       *eventfd;
 	struct kvm_io_bus	 *bus;
 	int                       ret = -ENOENT;
+	bool                      wildcard;
 
 	eventfd = eventfd_ctx_fdget(args->fd);
 	if (IS_ERR(eventfd))
 		return PTR_ERR(eventfd);
 
+	wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH);
+
 	mutex_lock(&kvm->slots_lock);
 
 	list_for_each_entry_safe(p, tmp, &kvm->ioeventfds, list) {
-		bool wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH);
 
 		if (p->bus_idx != bus_idx ||
 		    p->eventfd != eventfd  ||