Re: [PATCH 06/11] iov_iter: overlay struct iovec and ubuf/len

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On Wed, Mar 29, 2023 at 12:49 PM Jens Axboe <axboe@xxxxxxxxx> wrote:
>
> We can get rid of these if we convert the iov_iter initializers to
> just assign the members rather than the copy+zero fill. The automatic
> zero fill is nice though, in terms of sanity.

The automatic zero fill is good, but I think it should be fixed by
just not making that

        const struct iovec __ubuf_iovec;

member be the first member of a union.

The way union initializers work is that if they aren't named, they are
for the first member.

So I *think* the reason you get that warning is literally just because
the __ubuf_iovec member is first in that union, and moving it down to
below the other struct will just fix things.

                   Linus




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