From 5e61f27070292d4ad3af51dc68eebab6c1df69d3 Mon Sep 17 00:00:00 2001 From: Andrii Nakryiko Date: Fri, 4 Oct 2019 15:40:34 -0700 Subject: libbpf: stop enforcing kern_version, populate it for users Kernel version enforcement for kprobes/kretprobes was removed from 5.0 kernel in 6c4fc209fcf9 ("bpf: remove useless version check for prog load"). Since then, BPF programs were specifying SEC("version") just to please libbpf. We should stop enforcing this in libbpf, if even kernel doesn't care. Furthermore, libbpf now will pre-populate current kernel version of the host system, in case we are still running on old kernel. This patch also removes __bpf_object__open_xattr from libbpf.h, as nothing in libbpf is relying on having it in that header. That function was never exported as LIBBPF_API and even name suggests its internal version. So this should be safe to remove, as it doesn't break ABI. Signed-off-by: Andrii Nakryiko Signed-off-by: Alexei Starovoitov --- tools/testing/selftests/bpf/progs/test_stacktrace_map.c | 1 - 1 file changed, 1 deletion(-) (limited to 'tools/testing/selftests/bpf/progs/test_stacktrace_map.c') diff --git a/tools/testing/selftests/bpf/progs/test_stacktrace_map.c b/tools/testing/selftests/bpf/progs/test_stacktrace_map.c index fa0be3e10a10..3b7e1dca8829 100644 --- a/tools/testing/selftests/bpf/progs/test_stacktrace_map.c +++ b/tools/testing/selftests/bpf/progs/test_stacktrace_map.c @@ -74,4 +74,3 @@ int oncpu(struct sched_switch_args *ctx) } char _license[] SEC("license") = "GPL"; -__u32 _version SEC("version") = 1; /* ignored by tracepoints, required by libbpf.a */ -- cgit