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

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Message-ID: <20211018151811.GA30977@lst.de>
Date:   Mon, 18 Oct 2021 17:18:11 +0200
From:   Christoph Hellwig <hch@....de>
To:     Coly Li <colyli@...e.de>
Cc:     Arnd Bergmann <arnd@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        Jens Axboe <axboe@...nel.dk>,
        Kent Overstreet <kmo@...erainc.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Christoph Hellwig <hch@....de>
Subject: Re: [PATCH] [v2] bcache: hide variable-sized types from uapi
 header check

On Mon, Oct 18, 2021 at 10:42:37PM +0800, Coly Li wrote:
> I am quite open for this idea. It is in uapi directory before I maintain 
> bcache. I just though the header fines on-media format should go into 
> include/uapi/, but if this is not the restricted rule, it is fine for me to 
> move this header to drivers/md/bcache/.

Having the on-disk format in uapi seems weird.  It isn't a userspace
ABI in any way.