On Tue, 26 Feb 2013 15:20:52 +0100
Stefan Hajnoczi <stefanha@xxxxxxxxx> wrote:
> On Tue, Feb 26, 2013 at 12:55:36PM +0200, Michael S. Tsirkin wrote:
> > On Mon, Feb 25, 2013 at 04:27:49PM +0100, Cornelia Huck wrote:
> > > diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
> > > index f0ced1a..8de3cd7 100644
> > > --- a/virt/kvm/eventfd.c
> > > +++ b/virt/kvm/eventfd.c
> > > @@ -679,11 +679,16 @@ static int
> > > kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
> > > {
> > > int pio = args->flags & KVM_IOEVENTFD_FLAG_PIO;
> > > - enum kvm_bus bus_idx = pio ? KVM_PIO_BUS : KVM_MMIO_BUS;
> > > + int ccw;
> > > + enum kvm_bus bus_idx;
> > > struct _ioeventfd *p;
> > > struct eventfd_ctx *eventfd;
> > > int ret;
> > >
> > > + ccw = args->flags & KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY;
> > > + bus_idx = pio ? KVM_PIO_BUS :
> > > + ccw ? KVM_VIRTIO_CCW_NOTIFY_BUS :
> > > + KVM_MMIO_BUS;
> >
> > May be better to rewrite using if/else.
>
> Saw this after sending my comment. I agree with Michael, an if
> statement allows you to drop the locals and capture the bus_idx
> conversion in a single place (it could even be a static function to save
> duplicating the code in both functions that use it).
>
> Stefan
>
Introducing a helper function sounds reasonable.
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