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Date:   Sat, 9 May 2020 22:49:28 +0200
From:   Stephen Kitt <>
To:     Jakub Kicinski <>
Cc:     "David S . Miller" <>,
        Joe Perches <>,,
Subject: Re: [PATCH v2] net: Protect INET_ADDR_COOKIE on 32-bit

On Sat, 9 May 2020 21:05:48 +0200, Stephen Kitt <> wrote:
> On Sat, 9 May 2020 10:59:14 -0700, Jakub Kicinski <> wrote:
> > What if we went back to your original proposal of an empty struct but
> > added in an extern in front? That way we should get linker error on
> > pointer references.  
> That silently fails to fail if any other link object provides a definition
> for the symbol, even if the type doesn’t match...

And it breaks the build if INET_ADDR_COOKIE is used twice in the same unit,
e.g. in inet_hashtables.c.



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