Re: build failure of next-20220811 due to d79b32c2e4a4 ("vdpa_sim_blk: add support for discard and write-zeroes")

[Stefano Garzarella]

Hi Sudip,

On Thu, Aug 11, 2022 at 06:22:54PM +0100, Sudip Mukherjee (Codethink) wrote:
> Hi All,
>
> Not sure if it has been reported, builds of arm64 with clang failed to
> build next-20220811 with the error:
>
> drivers/vdpa/vdpa_sim/vdpa_sim_blk.c:201:3: error: expected expression
>                struct virtio_blk_discard_write_zeroes range;
>                ^
> drivers/vdpa/vdpa_sim/vdpa_sim_blk.c:204:25: error: use of undeclared identifier 'range'
>                if (to_pull != sizeof(range)) {
>                                      ^
> drivers/vdpa/vdpa_sim/vdpa_sim_blk.c:207:21: error: use of undeclared identifier 'range'
>                                to_pull, sizeof(range));
>                                                ^
> drivers/vdpa/vdpa_sim/vdpa_sim_blk.c:212:60: error: use of undeclared identifier 'range'
>                bytes = vringh_iov_pull_iotlb(&vq->vring, &vq->out_iov, &range,
>                                                                         ^
> drivers/vdpa/vdpa_sim/vdpa_sim_blk.c:222:38: error: use of undeclared identifier 'range'
>                sector = vdpasim64_to_cpu(vdpasim, range.sector);
>                                                   ^
> drivers/vdpa/vdpa_sim/vdpa_sim_blk.c:224:43: error: use of undeclared identifier 'range'
>                num_sectors = vdpasim32_to_cpu(vdpasim, range.num_sectors);
>                                                        ^
> drivers/vdpa/vdpa_sim/vdpa_sim_blk.c:225:37: error: use of undeclared identifier 'range'
>                flags = vdpasim32_to_cpu(vdpasim, range.flags);
>                                                  ^
> drivers/vdpa/vdpa_sim/vdpa_sim_blk.c:202:7: error: mixing declarations and code is incompatible with standards before C99 [-Werror,-Wdeclaration-after-statement]
>                u32 num_sectors, flags;
>                    ^
> 8 errors generated.
>
>
> git bisect pointed to d79b32c2e4a4 ("vdpa_sim_blk: add support for discard and write-zeroes").
> And, reverting that commit has fixed the build failure.
>
> I will be happy to test any patch or provide any extra log if needed.

Thanks for the report, I already re-sent a new series with that patch 
fixed:
https://lore.kernel.org/virtualization/20220811083632.77525-1-sgarzare@xxxxxxxxxx/T/#t

And it looks like it's already in Michael's tree:
https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next

Thanks,
Stefano