From: Alexei Starovoitov <ast@kernel.org> mainline inclusion from mainline-5.17-rc1 commit 29f2e5bd9439445fe14ba8570b1c9a7ad682df84 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I5EUVD CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... ------------------------------------------------- When CONFIG_DEBUG_INFO_BTF_MODULES is not set the following warning can be seen: kernel/bpf/btf.c:6588:13: warning: 'purge_cand_cache' defined but not used [-Wunused-function] Fix it. Fixes: 1e89106da253 ("bpf: Add bpf_core_add_cands() and wire it into bpf_core_apply_relo_insn().") Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20211207014839.6976-1-alexei.starovoitov@gmail.c... (cherry picked from commit 29f2e5bd9439445fe14ba8570b1c9a7ad682df84) Signed-off-by: Wang Yufen <wangyufen@huawei.com> --- kernel/bpf/btf.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index 3cb538408043..b63b1f0fac90 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -6430,6 +6430,7 @@ static struct bpf_cand_cache *populate_cand_cache(struct bpf_cand_cache *cands, return new_cands; } +#ifdef CONFIG_DEBUG_INFO_BTF_MODULES static void __purge_cand_cache(struct btf *btf, struct bpf_cand_cache **cache, int cache_size) { @@ -6468,6 +6469,7 @@ static void purge_cand_cache(struct btf *btf) __purge_cand_cache(btf, module_cand_cache, MODULE_CAND_CACHE_SIZE); mutex_unlock(&cand_cache_mutex); } +#endif static struct bpf_cand_cache * bpf_core_add_cands(struct bpf_cand_cache *cands, const struct btf *targ_btf, -- 2.20.1