Re: [PATCH] rbd: avoid clang -Wuninitialized warning

[Arnd Bergmann]

On Fri, Mar 22, 2019 at 5:33 PM Ilya Dryomov <idryomov@xxxxxxxxx> wrote:
>
> On Fri, Mar 22, 2019 at 3:36 PM Arnd Bergmann <arnd@xxxxxxxx> wrote:
> >
> > diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
> > index 4ba967d65cf9..cbcc3baf3807 100644
> > --- a/drivers/block/rbd.c
> > +++ b/drivers/block/rbd.c
> > @@ -2399,7 +2399,7 @@ static int rbd_obj_read_from_parent(struct rbd_obj_request *obj_req)
> >                                                       &obj_req->bvec_pos);
> >                         break;
> >                 default:
> > -                       rbd_assert(0);
> > +                       BUG();
> >                 }
> >         } else {
> >                 ret = rbd_img_fill_from_bvecs(child_img_req,
>
> Hi Arnd,
>
> You did a couple of these last year in commit c6244b3b2377 ("rbd: avoid
> Wreturn-type warnings").

Ah, I had completely forgotten about that. Different bug and different
compiler, but same solution ;-)

>  Let's change all of those default cases to BUG
> in one go.  Do you want to do that or should I?

I've prepared another patch now and sent it out, please
apply it on top. I'd like this one-line patch to stay separate though
since it captures the warning message and may need to
be backported to stable kernels later.

      Arnd