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29523c5e67
resolve_btfids doesn't like empty set. Add unused ID when BPF_LSM is off. Fixes: 1e6c62a88215 ("bpf: Introduce sleepable BPF programs") Reported-by: Björn Töpel <bjorn.topel@gmail.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Tested-by: Song Liu <songliubraving@fb.com> Acked-by: KP Singh <kpsingh@google.com> Link: https://lore.kernel.org/bpf/20200831163132.66521-1-alexei.starovoitov@gmail.com