Re: [PATCH V5 00/22] IOREQ feature (+ virtio-mmio) on Arm

[Julien Grall <julien.grall.oss@xxxxxxxxx>]

On Mon, 25 Jan 2021 at 20:56, Stefano Stabellini <sstabellini@xxxxxxxxxx> wrote:
>
> Julien,

Hi,

>
> This seems to be an arm randconfig failure:
>
> https://gitlab.com/xen-project/patchew/xen/-/pipelines/246632953
> https://gitlab.com/xen-project/patchew/xen/-/jobs/985455044

Thanks! The error is:

#'target_mem_ref' not supported by expression#'memory.c: In function
'do_memory_op':
memory.c:1210:18: error:  may be used uninitialized in this function
[-Werror=maybe-uninitialized]
 1210 |             rc = set_foreign_p2m_entry(currd, d, gfn_list[i],
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1211 |                                        _mfn(mfn_list[i]));
      |                                        ~~~~~~~~~~~~~~~~~~

I found a few references online of the error message, but it is not
clear what it means. From a quick look at Oleksandr's branch, I also
can't spot anything unitialized. Any ideas?

Cheers,