[PATCH bpf-next] selftests/bpf: Add cb_refs test to s390x deny list

[Daniel Müller <deso@xxxxxxxxxx>]

The cb_refs BPF selftest is failing execution on s390x machines. This is
a newly added test that requires a feature not presently supported on
this architecture.
Denylist the test for this architecture.

Fixes: 3cf7e7d8685c ("selftests/bpf: Add tests for reference state fixes for callbacks")
Signed-off-by: Daniel Müller <deso@xxxxxxxxxx>
---
 tools/testing/selftests/bpf/DENYLIST.s390x | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/bpf/DENYLIST.s390x b/tools/testing/selftests/bpf/DENYLIST.s390x
index a708c3d..37bafcb 100644
--- a/tools/testing/selftests/bpf/DENYLIST.s390x
+++ b/tools/testing/selftests/bpf/DENYLIST.s390x
@@ -66,3 +66,4 @@ select_reuseport                         # intermittently fails on new s390x set
 xdp_synproxy                             # JIT does not support calling kernel function                                (kfunc)
 unpriv_bpf_disabled                      # fentry
 setget_sockopt                           # attach unexpected error: -524                                               (trampoline)
+cb_refs                                  # expected error message unexpected error: -524                               (trampoline)
-- 
2.30.2