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Date:   Mon, 31 Aug 2020 09:31:32 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     davem@...emloft.net
Cc:     daniel@...earbox.net, bjorn.topel@...il.com,
        netdev@...r.kernel.org, bpf@...r.kernel.org, kernel-team@...com
Subject: [PATCH bpf-next] bpf: Fix build without BPF_LSM.

From: Alexei Starovoitov <ast@...nel.org>

resolve_btfids doesn't like empty set. Add unused ID when BPF_LSM is off.

Reported-by: Björn Töpel <bjorn.topel@...il.com>
Fixes: 1e6c62a88215 ("bpf: Introduce sleepable BPF programs")
Signed-off-by: Alexei Starovoitov <ast@...nel.org>
---
 kernel/bpf/verifier.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 3ebfdb7bd427..b4c22b5ce5a2 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -11008,6 +11008,8 @@ BTF_SET_START(btf_sleepable_lsm_hooks)
 #ifdef CONFIG_BPF_LSM
 BTF_ID(func, bpf_lsm_file_mprotect)
 BTF_ID(func, bpf_lsm_bprm_committed_creds)
+#else
+BTF_ID_UNUSED
 #endif
 BTF_SET_END(btf_sleepable_lsm_hooks)
 
-- 
2.23.0

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