[PATCH bpf-next 0/2] selftests/bpf: Skip libarena when arena spin locks are unsupported

[Qiliang Yuan]

serial_test_libarena runs the test programs of libarena, whose buddy
allocator serializes its operations with an arena spin lock.

arena_spin_lock() fails with -EOPNOTSUPP on kernels built with more
than 1024 possible CPUs, as distributions commonly configure them.
buddy_init() reports that as -EINVAL, and every test then fails at
arena_buddy_reset.

Patch 1 makes buddy_init() return the error of the lock, patch 2 skips
the tests when resetting the allocator fails with -EOPNOTSUPP.

Signed-off-by: Qiliang Yuan <odys.yuan@xxxxxxxxx>
---
Qiliang Yuan (2):
      selftests/bpf: Return the lock error from buddy_init() of libarena
      selftests/bpf: Skip libarena on kernels with too many possible CPUs

 tools/testing/selftests/bpf/libarena/src/buddy.bpf.c | 5 +++--
 tools/testing/selftests/bpf/prog_tests/libarena.c    | 9 +++++++++
 2 files changed, 12 insertions(+), 2 deletions(-)
---
base-commit: e1d84a37cba984388988d2f1ddc84561413f0db2
change-id: 20261009-selftests-bpf-libarena-nr-cpus-50fc5dd00fe2

Best regards,
-- 
Qiliang Yuan <odys.yuan@xxxxxxxxx>