Re: [PATCH bpf-next v2 2/4] libbpf: add support for BPF_CGROUP_INET_SOCK_RELEASE

On Fri, Jun 26, 2020 at 05:59:41PM -0700, Andrii Nakryiko wrote:

As for the cover letter, unless it's some trivial independent fixes,
cover letter ties everything together and is a good place to track
"what changed between versions". So I'd recommend adding it anyways.

+1
For independent fixes it's ok to skip cover, but it's often nice to have one.
New release hook like this one certainly deserves a cover.