[PATCH bpf-next v2 0/5] Fix unique field logic in BTF

[Kumar Kartikeya Dwivedi <memxor@gmail.com>]

Fix constraint of certain fields that have to be unique when nested
structs are present, BPF_REFCOUNT which should be marked as unique.
See commit logs for details. While at it, fix improper offset check.

Changelog:
----------
v1 -> v2
v1: https://lore.kernel.org/bpf/20260719142401.2420111-1-memxor@gmail.com

 * Add fix for BPF_REFCOUNT not being unique. (Sashiko)
 * Roll improper offset warning check into series. (Sashiko)

Kumar Kartikeya Dwivedi (5):
  bpf: Fix offset warn check for bpf_res_spin_lock
  bpf: Preserve unique-field state across nested structs
  bpf: Mark bpf_refcount field as unique
  selftests/bpf: Test duplicate unique fields in nested structs
  selftests/bpf: Test duplicate bpf_refcount fields

 kernel/bpf/btf.c                             | 30 ++++++------
 tools/testing/selftests/bpf/prog_tests/btf.c | 48 ++++++++++++++++++++
 2 files changed, 64 insertions(+), 14 deletions(-)


base-commit: ecf11bc5f56abb3a2219a8c75e8a5b54467d1781
-- 
2.53.0