This patch series improves the ACPI nsrepair2 sorting implementation
   and adds comprehensive KUnit tests.

   Patch 1 replaces the O(n²) bubble sort algorithm in acpi_ns_sort_list()
   with the kernel's sort_r() function, which uses heapsort to achieve
   O(n log n) time complexity. This improves performance when sorting
   large ACPI package lists (e.g., _PSS, _TSS) while reducing code
   complexity by leveraging the existing kernel sort API.

   Patch 2 adds KUnit tests to verify the repair functions in nsrepair2.c,
   covering:
     - ACPI operand object creation (integer, string, buffer, package)
     - Namespace node creation and NAMESEG comparison
     - Package structures for _PSS, _CST, _ALR, _PRT methods
     - _HID string format verification
     - _FDE buffer expansion
     - Sorting logic with ascending/descending order



Nick Huang (2):
  ACPI: nsrepair2: Replace O(n²) bubble sort with O(n log n) sort_r()
  ACPI: acpica: Add KUnit tests for nsrepair2 repair functions

 drivers/acpi/acpica/nsrepair2.c      |  87 ++-
 drivers/acpi/acpica/nsrepair2_test.c | 854 +++++++++++++++++++++++++++
 2 files changed, 916 insertions(+), 25 deletions(-)
 create mode 100644 drivers/acpi/acpica/nsrepair2_test.c

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2.43.0