Re: [PATCH v3 1/1] virtio: fix the condition for iommu_platform not supported

[Halil Pasic]

On Tue, 1 Feb 2022 11:52:06 -0500
"Michael S. Tsirkin" <mst@redhat.com> wrote:

> > > +    bool vdev_has_iommu = false;  
> > 
> > Isn't vdev_has_iommu set unconditionally before you try to use it?  
> 
> I'd like to know too.

Yes it is. Was meant as a conservative thing. AFAIR in C stuff on stack
is not initialized to anything in particular so the idea was better
use false than garbage if someone made a mistake. But on the other
hand compilers can warn about that, and this defeats the compiler
warning. So uninitialized is indeed better.