Re: [PATCH net-next v5 10/11] bpf: Remove bpf_sys.h from selftests

Add require dependency headers.

Signed-off-by: Mickaël Salaün <mic@digikod.net>
Cc: Alexei Starovoitov <redacted>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Shuah Khan <shuah@kernel.org>
---
  tools/lib/bpf/bpf.c                         |  6 ++++++
  tools/testing/selftests/bpf/bpf_sys.h       | 27 ---------------------------
  tools/testing/selftests/bpf/test_lpm_map.c  |  1 -
  tools/testing/selftests/bpf/test_lru_map.c  |  1 -
  tools/testing/selftests/bpf/test_maps.c     |  1 -
  tools/testing/selftests/bpf/test_tag.c      |  3 +--
  tools/testing/selftests/bpf/test_verifier.c |  4 ++--
  7 files changed, 9 insertions(+), 34 deletions(-)
  delete mode 100644 tools/testing/selftests/bpf/bpf_sys.h

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index f8a2b7fa7741..50e04cc5dddd 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c

@@ -50,7 +50,13 @@ static __u64 ptr_to_u64(const void *ptr)
  static int sys_bpf(enum bpf_cmd cmd, union bpf_attr *attr,
  		   unsigned int size)
  {
+#ifdef __NR_bpf
  	return syscall(__NR_bpf, cmd, attr, size);
+#else
+	fprintf(stderr, "No bpf syscall, kernel headers too old?\n");
+	errno = ENOSYS;
+	return -1;
+#endif
  }