Comments in the verifier refer to free_bpf_prog_info() which
seems to have never existed in tree.  Replace it with
free_used_maps().
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
                        /* hold the map. If the program is rejected by verifier,
                         * the map will be released by release_maps() or it
                         * will be used by the valid program until it's unloaded
-                        * and all maps are released in free_bpf_prog_info()
+                        * and all maps are released in free_used_maps()
                         */
                        map = bpf_map_inc(map, false);
                        if (IS_ERR(map)) {
 err_release_maps:
        if (!env->prog->aux->used_maps)
                /* if we didn't copy map pointers into bpf_prog_info, release
-                * them now. Otherwise free_bpf_prog_info() will release them.
+                * them now. Otherwise free_used_maps() will release them.
                 */
                release_maps(env);
        *prog = env->prog;