Subject: Re: [PATCH bpf-next 2/2] libbpf, xsk: add libbpf_smp_store_release libbpf_smp_load_acquire

From: Toke Høiland-Jørgensen <[email-masked]>
Date: Mon, 01 Mar 2021 17:10:29 +0100

Björn Töpel <[email-masked]> writes:

> From: Björn Töpel <[email-masked]>
>
> Now that the AF_XDP rings have load-acquire/store-release semantics,
> move libbpf to that as well.
>
> The library-internal libbpf_smp_{load_acquire,store_release} are only
> valid for 32-bit words on ARM64.
>
> Also, remove the barriers that are no longer in use.

So what happens if an updated libbpf is paired with an older kernel (or
vice versa)?

-Toke