On Sat, 9 May 2020 22:49:28 +0200 Stephen Kitt wrote: > On Sat, 9 May 2020 21:05:48 +0200, Stephen Kitt <st...@sk2.org> wrote: > > On Sat, 9 May 2020 10:59:14 -0700, Jakub Kicinski <k...@kernel.org> 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.
Ah, so we'd have to use a valid type like, say, char.
