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| author | Andrii Nakryiko <andrii@kernel.org> | 2024-02-05 16:40:08 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2024-02-05 20:02:38 -0800 |
| commit | c7dcb6c9aa85fa310251dad7e233eb955a5235ed (patch) | |
| tree | 1b1f362cb3489569fd473d0fda11c678c016df7c /tools/testing/selftests/bpf/prog_tests/tracing_struct.c | |
| parent | d7bc416aa5cc183691287e8f0b1d5b182a7ce9c3 (diff) | |
selftests/bpf: mark dynptr kfuncs __weak to make them optional on old kernels
Mark dynptr kfuncs as __weak to allow
verifier_global_subprogs/arg_ctx_{perf,kprobe,raw_tp} subtests to be
loadable on old kernels. Because bpf_dynptr_from_xdp() kfunc is used
from arg_tag_dynptr BPF program in progs/verifier_global_subprogs.c
*and* is not marked as __weak, loading any subtest from
verifier_global_subprogs fails on old kernels that don't have
bpf_dynptr_from_xdp() kfunc defined. Even if arg_tag_dynptr program
itself is not loaded, libbpf bails out on non-weak reference to
bpf_dynptr_from_xdp (that can't be resolved), which shared across all
programs in progs/verifier_global_subprogs.c.
So mark all dynptr-related kfuncs as __weak to unblock libbpf CI ([0]).
In the upcoming "kfunc in vmlinux.h" work we should make sure that
kfuncs are always declared __weak as well.
[0] https://github.com/libbpf/libbpf/actions/runs/7792673215/job/21251250831?pr=776#step:4:7961
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20240206004008.1541513-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/tracing_struct.c')
0 files changed, 0 insertions, 0 deletions