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

Björn Töpel [off-list ref] writes:

From: Björn Töpel <redacted>

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