[PATCH v3 0/2] printf: convert self-test to KUnit

[Tamir Duberstein <tamird@gmail.com>]

This is one of just 3 remaining "Test Module" kselftests (the others
being bitmap and scanf), the rest having been converted to KUnit.

I tested this using:

$ tools/testing/kunit/kunit.py run --arch arm64 --make_options LLVM=1 printf

I have also sent out a series converting scanf[0].

Link: https://lore.kernel.org/all/20250204-scanf-kunit-convert-v3-0-386d7c3ee714@gmail.com/T/#u [0]

Signed-off-by: Tamir Duberstein <tamird@gmail.com>
---
Changes in v3:
- Remove extraneous trailing newlines from failure messages.
- Replace `pr_warn` with `kunit_warn`.
- Drop arch changes.
- Remove KUnit boilerplate from CONFIG_PRINTF_KUNIT_TEST help text.
- Restore `total_tests` counting.
- Remove tc_fail macro in last patch.
- Link to v2: https://lore.kernel.org/r/20250207-printf-kunit-convert-v2-0-057b23860823@gmail.com

Changes in v2:
- Incorporate code review from prior work[0] by Arpitha Raghunandan.
- Link to v1: https://lore.kernel.org/r/20250204-printf-kunit-convert-v1-0-ecf1b846a4de@gmail.com

Link: https://lore.kernel.org/lkml/20200817043028.76502-1-98.arpi@gmail.com/t/#u [0]

---
Tamir Duberstein (2):
      printf: convert self-test to KUnit
      printf: break kunit into test cases

 Documentation/core-api/printk-formats.rst |   2 +-
 MAINTAINERS                               |   2 +-
 lib/Kconfig.debug                         |  12 +-
 lib/Makefile                              |   2 +-
 lib/{test_printf.c => printf_kunit.c}     | 429 +++++++++++++-----------------
 tools/testing/selftests/lib/config        |   1 -
 tools/testing/selftests/lib/printf.sh     |   4 -
 7 files changed, 192 insertions(+), 260 deletions(-)
---
base-commit: a64dcfb451e254085a7daee5fe51bf22959d52d3
change-id: 20250131-printf-kunit-convert-fd4012aa2ec6

Best regards,
-- 
Tamir Duberstein <tamird@gmail.com>