Files
linux/lib
Guenter Roeck bbc960d009 kunit: Add backtrace suppression self-tests
Add unit tests to verify that warning backtrace suppression works.

Tests cover both API forms:
- Scoped: kunit_warning_suppress() with in-block count verification
  and post-block inactivity check.
- Direct functions: kunit_start/end_suppress_warning() with
  sequential independent suppression blocks and per-block counts.

Furthermore, tests verify incremental warning counting, that
kunit_has_active_suppress_warning() transitions correctly around
suppression boundaries, and that suppression active in the test
kthread does not leak to a separate kthread.

If backtrace suppression does _not_ work, the unit tests will likely
trigger unsuppressed backtraces, which should actually help to get
the affected architectures / platforms fixed.

Link: https://lore.kernel.org/r/20260514-kunit_add_support-v11-2-b36a530a6d8f@redhat.com
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Acked-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Alessandro Carminati <acarmina@redhat.com>
Reviewed-by: David Gow <david@davidgow.net>
Signed-off-by: Albert Esteve <aesteve@redhat.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2026-05-14 10:50:00 -06:00
..
2026-04-07 17:38:07 +02:00
2026-04-02 23:36:22 -07:00
2025-03-16 22:30:49 -07:00
2025-04-11 17:32:37 -07:00
2026-03-05 22:16:08 -05:00
2021-08-19 09:02:55 +09:00
2023-02-02 22:50:01 -08:00
2023-02-02 22:50:01 -08:00
2021-01-03 20:05:18 -05:00
2026-04-13 08:39:51 -07:00
2021-08-19 09:02:55 +09:00
2026-04-02 23:36:16 -07:00
2025-10-24 21:39:27 +02:00
2024-10-14 16:33:24 -05:00
2026-01-11 06:09:11 -10:00
2026-02-27 16:40:16 +01:00
2021-07-08 11:48:20 -07:00
2024-02-15 12:17:28 -05:00
2021-06-18 11:43:09 +02:00
2026-03-24 13:39:53 -04:00
2025-03-25 10:18:31 -03:00
2026-04-18 00:10:48 -07:00
2024-12-09 13:48:29 -08:00
2025-09-13 16:54:46 -07:00