From: Jiri Olsa <jolsa@kernel.org>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: Delyan Kratunov <delyank@fb.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
netdev@vger.kernel.org, bpf@vger.kernel.org,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>
Subject: [PATCH] bpftool: Fix generated code in codegen_asserts
Date: Mon, 28 Mar 2022 10:37:03 +0200 [thread overview]
Message-ID: <20220328083703.2880079-1-jolsa@kernel.org> (raw)
Arnaldo reported perf compilation fail with:
$ make -k BUILD_BPF_SKEL=1 CORESIGHT=1 PYTHON=python3
...
In file included from util/bpf_counter.c:28:
/tmp/build/perf//util/bpf_skel/bperf_leader.skel.h: In function ‘bperf_leader_bpf__assert’:
/tmp/build/perf//util/bpf_skel/bperf_leader.skel.h:351:51: error: unused parameter ‘s’ [-Werror=unused-parameter]
351 | bperf_leader_bpf__assert(struct bperf_leader_bpf *s)
| ~~~~~~~~~~~~~~~~~~~~~~~~~^
cc1: all warnings being treated as errors
If there's nothing to generate in the new assert function,
we will get unused 's' warn/error, adding 'unused' attribute to it.
Cc: Delyan Kratunov <delyank@fb.com>
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Fixes: 08d4dba6ae77 ("bpftool: Bpf skeletons assert type sizes")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/bpf/bpftool/gen.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/bpf/bpftool/gen.c b/tools/bpf/bpftool/gen.c
index 7ba7ff55d2ea..91af2850b505 100644
--- a/tools/bpf/bpftool/gen.c
+++ b/tools/bpf/bpftool/gen.c
@@ -477,7 +477,7 @@ static void codegen_asserts(struct bpf_object *obj, const char *obj_name)
codegen("\
\n\
__attribute__((unused)) static void \n\
- %1$s__assert(struct %1$s *s) \n\
+ %1$s__assert(struct %1$s *s __attribute__((unused))) \n\
{ \n\
#ifdef __cplusplus \n\
#define _Static_assert static_assert \n\
--
2.35.1
next reply other threads:[~2022-03-28 8:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-28 8:37 Jiri Olsa [this message]
2022-03-28 14:57 ` [PATCH] bpftool: Fix generated code in codegen_asserts Arnaldo Carvalho de Melo
2022-03-28 15:41 ` Yonghong Song
2022-03-28 18:50 ` Jiri Olsa
2022-03-28 21:31 ` Andrii Nakryiko
2022-03-28 22:53 ` Yonghong Song
2022-03-29 2:20 ` patchwork-bot+netdevbpf
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