[PATCH] elf: Fix fences in _dl_find_object_update (bug 28745)

[Florian Weimer]

* Andreas Schwab:

> On Jan 05 2022, Florian Weimer via Libc-alpha wrote:
>
>> As explained in Hans Boehm, Can Seqlocks Get Along with Programming
>> Language Memory Models?, an acquire fence is needed in
>> _dlfo_read_success.  The lack of a fence was
>
> This sentence is

I meant to write:

    As explained in Hans Boehm, Can Seqlocks Get Along with Programming
    Language Memory Models?, an acquire fence is needed in
    _dlfo_read_success.  The lack of a fence resulted in an observable
    bug on powerpc64le compile-time load reordering.

Thanks,
Florian