linux-kernel - Re: [PATCH] [v2] bcache: hide variable-sized types from uapi header check

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Date:   Mon, 18 Oct 2021 16:39:32 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Coly Li <colyli@...e.de>
Cc:     Arnd Bergmann <arnd@...db.de>, Jens Axboe <axboe@...nel.dk>,
        Kent Overstreet <kmo@...erainc.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] [v2] bcache: hide variable-sized types from uapi header check

On Mon, Oct 18, 2021 at 4:20 PM Coly Li <colyli@...e.de> wrote:
>
> IMHO, remove bcache related header from uapi check might be better
> solution. So far only bcache-tools uses this header with its own copy,
> no application includes the header(s) so far. It makes sense to exclude
> bcache.h from upai headers check.

Should we just move it to include/linux/ and out of the uapi headers entirely
then? It sounds like it's not actually an ABI but just the definition of the
data layout that is not included by anything from user space.

We are a bit inconsistent here already, e.g. btrfs has all its structures
in uapi, but ext4 does not.

       Arnd