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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 <yili@winhong.com>
Message-Id: <20200911055652.3041762-1-yili@winhong.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Yi Li 2020-09-11 13:56:52 +08:00 committed by Paolo Bonzini
parent b9757a4b6f
commit 2fc4f15dac
1 changed files with 3 additions and 1 deletions
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4
virt/kvm/eventfd.c
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@ -853,15 +853,17 @@ kvm_deassign_ioeventfd_idx(struct kvm *kvm, enum kvm_bus bus_idx,
struct eventfd_ctx *eventfd; struct eventfd_ctx *eventfd;
struct kvm_io_bus *bus; struct kvm_io_bus *bus;
int ret = -ENOENT; int ret = -ENOENT;
bool wildcard;
eventfd = eventfd_ctx_fdget(args->fd); eventfd = eventfd_ctx_fdget(args->fd);
if (IS_ERR(eventfd)) if (IS_ERR(eventfd))
return PTR_ERR(eventfd); return PTR_ERR(eventfd);
wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH);
mutex_lock(&kvm->slots_lock); mutex_lock(&kvm->slots_lock);
list_for_each_entry_safe(p, tmp, &kvm->ioeventfds, list) { list_for_each_entry_safe(p, tmp, &kvm->ioeventfds, list) {
bool wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH);
if (p->bus_idx != bus_idx || if (p->bus_idx != bus_idx ||
p->eventfd != eventfd || p->eventfd != eventfd ||