[PATCH bpf-next v2 0/5] selftests/bpf: libarena cleanup and bitmap struct

[Emil Tsalapatis <emil@etsalapatis.com>]

Cleanup patches for libarena, along with a new bitmap data type that is
in use by sched-ext. Patch 1 is an NFC that properly renames the buddy
selftests for consistency. Patch 2 fixes the zero variable used in
libarena for can_loop based looping, and afterwrds removes all bpf_for()
instances from the code. Patch 3 fixes an (untriggered) edge case that 
could cause spurious selftest failures. Finally, patches 4 and 5
introduce the bitmap data structure along with selftests.

Signed-off-by: Emil Tsalapatis <emil@etsalapatis.com>


CHANGELOG

v1 -> v2: (https://lore.kernel.org/bpf/20260618085626.19633-1-emil@etsalapatis.com)

- Added acks by Ihor and Eduard
- Fix missing commit message (Ihor)
- Enforce 64 bits per cell with BITS_TO_LONG_LONG (Sashiko)
- Add test for bmp_copy (Ihor)
- Add atomic versions of _set() and _clear() (Ihor) and add a parallel
  selftest for them.


Emil Tsalapatis (5):
  selftests/bpf: libarena: Fix can-loop zero variable definition
  selftests/bpf: libarena: Clean up allocation state before buddy tests
  selftests/bpf: Add arena-based bitmap data structure
  selftests/bpf: libarena: Add bitmap selftets
  selftests/bpf: libarena: Add parallel bitmap selftest

 .../bpf/libarena/include/libarena/bitmap.h    |  34 ++
 .../bpf/libarena/include/libarena/common.h    |   2 +-
 .../libarena/selftests/test_asan_buddy.bpf.c  |   8 +-
 .../bpf/libarena/selftests/test_bitmap.bpf.c  | 394 ++++++++++++++++++
 .../bpf/libarena/selftests/test_buddy.bpf.c   |   8 +-
 .../selftests/test_parallel_bitmap.bpf.c      | 191 +++++++++
 .../selftests/test_parallel_spmc.bpf.c        |   9 +-
 .../selftests/bpf/libarena/src/bitmap.bpf.c   | 245 +++++++++++
 .../selftests/bpf/libarena/src/common.bpf.c   |   9 +-
 .../selftests/bpf/prog_tests/libarena.c       |   8 +-
 .../selftests/bpf/prog_tests/libarena_asan.c  |   8 +-
 11 files changed, 900 insertions(+), 16 deletions(-)
 create mode 100644 tools/testing/selftests/bpf/libarena/include/libarena/bitmap.h
 create mode 100644 tools/testing/selftests/bpf/libarena/selftests/test_bitmap.bpf.c
 create mode 100644 tools/testing/selftests/bpf/libarena/selftests/test_parallel_bitmap.bpf.c
 create mode 100644 tools/testing/selftests/bpf/libarena/src/bitmap.bpf.c

-- 
2.54.0