linux-next: build warning after merge of the bpf-next tree

Hi all,

After merging the bpf-next tree, today's linux-next build (powerpc
ppc64_defconfig) produced this warning:

kernel/bpf/btf.c:6588:13: warning: 'purge_cand_cache' defined but not used [-Wunused-function]
 6588 | static void purge_cand_cache(struct btf *btf)
      |             ^~~~~~~~~~~~~~~~

Introduced by commit

  1e89106da253 ("bpf: Add bpf_core_add_cands() and wire it into bpf_core_apply_relo_insn().")

-- 
Cheers,
Stephen Rothwell