diff options
| author | Ihor Solodrai <ihor.solodrai@linux.dev> | 2026-08-06 20:20:25 -0700 |
|---|---|---|
| committer | Eduard Zingerman <eddyz87@gmail.com> | 2026-08-06 22:01:28 -0700 |
| commit | 27a78c2e7eeea8397ad3c28171084e695d4c12af (patch) | |
| tree | bd56414c9da6a48bd4382903a716a67eebf4c0aa /scripts | |
| parent | 3d72aca40b83040aae08c3a3a3dfc5a42c26abe9 (diff) | |
resolve_btfids: Process KF_ARENA_* flags in resolve_btfids
For kfuncs flagged with KF_ARENA_RET, KF_ARENA_ARG1 or KF_ARENA_ARG2,
the address_space(1) attribute (a type tag with kflag=1) must be
emitted for the corresponding type in BTF. This was previously done by
pahole via the "attributes" BTF feature [1].
Implement the emission of the arena attributes in resolve_btfids: for
flagged kfuncs create a new function prototype with updated BTF types.
The original proto may be shared with sibling FUNCs, so it is not
modified in place.
Emission is unconditional: kbuild controls the pahole flags, so the
input BTF is expected to not have these attributes. Invalid
declarations are reported as errors.
Drop the "attributes" pahole feature from scripts/Makefile.btf
resolve_btfids now emits them for all supported pahole versions.
[1] https://lore.kernel.org/dwarves/20250228194654.1022535-1-ihor.solodrai@linux.dev/
Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://patch.msgid.link/20260807032029.78092-3-ihor.solodrai@linux.dev
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/Makefile.btf | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/scripts/Makefile.btf b/scripts/Makefile.btf index e66e13e79653..8f73c093d27a 100644 --- a/scripts/Makefile.btf +++ b/scripts/Makefile.btf @@ -16,8 +16,6 @@ else # Switch to using --btf_features for v1.26 and later. pahole-flags-$(call test-ge, $(pahole-ver), 126) = -j$(JOBS) --btf_features=encode_force,var,float,enum64,decl_tag,type_tag,optimized_func,consistent_func,decl_tag_kfuncs -pahole-flags-$(call test-ge, $(pahole-ver), 130) += --btf_features=attributes - pahole-flags-$(call test-ge, $(pahole-ver), 131) += --btf_features=layout endif |