Re: [PATCH bpf-next v8 04/11] bpf: support fsession for bpf_session_is_return

[Alexei Starovoitov]

On Wed, Jan 7, 2026 at 6:25 PM Menglong Dong <menglong8.dong@xxxxxxxxx> wrote:
>
> +       } else if (func_id == special_kfunc_list[KF_bpf_session_is_return]) {
> +               if (prog->expected_attach_type == BPF_TRACE_FSESSION)
> +                       addr = (unsigned long)bpf_fsession_is_return;

...

> +bool bpf_fsession_is_return(void *ctx)
> +{
> +       /* This helper call is inlined by verifier. */
> +       return !!(((u64 *)ctx)[-1] & (1 << BPF_TRAMP_M_IS_RETURN));
> +}
> +

Why do this specialization and introduce a global function
that will never be called, since it will be inlined anyway?

Remove the first hunk and make the 2nd a comment instead of a real function?