Ah, this is the bug in pahole described in https://lkml.org/lkml/2020/8/20/1862. I proposed a fix [1] but it hasn't reached pahole's master branch. Let me ask Arnaldo to see if he is OK merging it. [1] https://www.spinics.net/lists/dwarves/msg00451.html On Tue, Sep 29, 2020 at 9:36 PM Alexei Starovoitov <alexei.starovoitov@xxxxxxxxx> wrote: > > On Tue, Sep 29, 2020 at 4:50 PM Hao Luo <haoluo@xxxxxxxxxx> wrote: > > > > v3 -> v4: > > - Rebasing > > - Cast bpf_[per|this]_cpu_ptr's parameter to void __percpu * before > > passing into per_cpu_ptr. > > Looks good, but doesn't work: > ./test_progs -t ksyms_btf > test_ksyms_btf:PASS:kallsyms_fopen 0 nsec > test_ksyms_btf:PASS:ksym_find 0 nsec > test_ksyms_btf:PASS:kallsyms_fopen 0 nsec > test_ksyms_btf:PASS:ksym_find 0 nsec > test_ksyms_btf:PASS:btf_exists 0 nsec > libbpf: extern (ksym) 'bpf_prog_active': incompatible types, expected > [4] int int, but kernel has [18729] var bpf_user_rnd_state > libbpf: failed to load object 'test_ksyms_btf' > libbpf: failed to load BPF skeleton 'test_ksyms_btf': -22 > test_ksyms_btf:FAIL:skel_open failed to open and load skeleton > #43 ksyms_btf:FAIL > > I have the latest pahole from master. Any ideas?
