On Tue, Sep 28, 2021 at 6:53 AM Hou Tao [off-list ref] wrote:

Add a writable bare tracepoint in bpf_testmod module, and
trigger its calling when reading /sys/kernel/bpf_testmod
with a specific buffer length. The reading will return
the value in writable context if the early return flag
is enabled in writable context.

Signed-off-by: Hou Tao <redacted>
---

LGTM.

Acked-by: Andrii Nakryiko <andrii@kernel.org>

 .../bpf/bpf_testmod/bpf_testmod-events.h      | 15 ++++++++
 .../selftests/bpf/bpf_testmod/bpf_testmod.c   | 10 ++++++
 .../selftests/bpf/bpf_testmod/bpf_testmod.h   |  5 +++
 .../selftests/bpf/prog_tests/module_attach.c  | 35 +++++++++++++++++++
 .../selftests/bpf/progs/test_module_attach.c  | 14 ++++++++
 tools/testing/selftests/bpf/test_progs.c      |  4 +--
 tools/testing/selftests/bpf/test_progs.h      |  2 ++
 7 files changed, 83 insertions(+), 2 deletions(-)

[...]