Re: [PATCH v2] include/uapi/linux/xfrm.h: Fix XFRM_MSG_MAPPING ABI breakage

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On Mon, Sep 13, 2021 at 12:23 PM Eugene Syromiatnikov <esyr@xxxxxxxxxx> wrote:
> On Mon, Sep 13, 2021 at 09:16:39AM +0200, Ondrej Mosnacek wrote:
> > Perhaps it would be a good idea to put a comment here to make it less
> > likely that this repeats in the future. Something like:
> >
> > /* IMPORTANT: Only insert new entries right above this line, otherwise
> > you break ABI! */
>
> Well, this statement is true for (almost) every UAPI-exposed enum, and
> netlink is vast and relies on enums heavily.  I think it is already
> mentioned somewhere in the documentation, and in the end it falls on the
> shoulders of the maintainers—to pay additional attention to UAPI changes.

Ok, fair enough.

-- 
Ondrej Mosnacek
Software Engineer, Linux Security - SELinux kernel
Red Hat, Inc.





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