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[bpf-next,v4,01/12] kbuild: bpf: Tell pahole to DECL_TAG kfuncs

Message ID e65d92ed7931999f7046c4115849e14ce1b87105.1717881178.git.dxu@dxuuu.xyz (mailing list archive)
State New
Headers show
Series bpf: Support dumping kfunc prototypes from BTF | expand

Commit Message

Daniel Xu June 8, 2024, 9:15 p.m. UTC
With [0], pahole can now discover kfuncs and inject DECL_TAG
into BTF. With this commit, we will start shipping said DECL_TAGs
to downstream consumers if pahole supports it.

This is useful for feature probing kfuncs as well as generating
compilable prototypes. This is particularly important as kfuncs
do not have stable ABI.

[0]: https://git.kernel.org/pub/scm/devel/pahole/pahole.git/commit/?h=next&id=72e88f29c6f7e14201756e65bd66157427a61aaf

Signed-off-by: Daniel Xu <dxu@dxuuu.xyz>
 scripts/Makefile.btf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/scripts/Makefile.btf b/scripts/Makefile.btf
index bca8a8f26ea4..2597e3d4d6e0 100644
--- a/scripts/Makefile.btf
+++ b/scripts/Makefile.btf
@@ -19,7 +19,7 @@  pahole-flags-$(call test-ge, $(pahole-ver), 125)	+= --skip_encoding_btf_inconsis
 # Switch to using --btf_features for v1.26 and later.
-pahole-flags-$(call test-ge, $(pahole-ver), 126)  = -j --btf_features=encode_force,var,float,enum64,decl_tag,type_tag,optimized_func,consistent_func
+pahole-flags-$(call test-ge, $(pahole-ver), 126)  = -j --btf_features=encode_force,var,float,enum64,decl_tag,type_tag,optimized_func,consistent_func,decl_tag_kfuncs