[PATCH bpf-next v3 0/4] btf_encoder: emit type tags for bpf_arena pointers

[Ihor Solodrai <ihor.solodrai@linux.dev>]

This patch series implements emitting appropriate BTF type tags for
argument and return types of kfuncs marked with KF_ARENA_* flags.

For additional context see the description of BPF patch
"bpf: define KF_ARENA_* flags for bpf_arena kfuncs" [1].

The feature depends on recent changes in libbpf [2].

[1] https://lore.kernel.org/bpf/20250206003148.2308659-1-ihor.solodrai@linux.dev/
[2] https://lore.kernel.org/bpf/20250130201239.1429648-1-ihor.solodrai@linux.dev/

v2->v3:
  * Nits in patch #1

v1->v2:
  * Rewrite patch #1 refactoring btf_encoder__tag_kfuncs(): now the
    post-processing step is removed entirely, and kfuncs are tagged in
    btf_encoder__add_func().
  * Nits and renames in patch #2
  * Add patch #4 editing man pages

v2: https://lore.kernel.org/dwarves/20250212201552.1431219-1-ihor.solodrai@linux.dev/
v1: https://lore.kernel.org/dwarves/20250207021442.155703-1-ihor.solodrai@linux.dev/

Ihor Solodrai (4):
  btf_encoder: refactor btf_encoder__tag_kfuncs()
  btf_encoder: emit type tags for bpf_arena pointers
  pahole: introduce --btf_feature=attributes
  man-pages: describe attributes and remove reproducible_build

 btf_encoder.c      | 279 +++++++++++++++++++++++----------------------
 dwarves.h          |   1 +
 man-pages/pahole.1 |   7 +-
 pahole.c           |  11 ++
 4 files changed, 158 insertions(+), 140 deletions(-)

-- 
2.48.1