linux-kernel - Re: [PATCH v4 0/2] libbpf: fix BTF dedup to support recursive typedef

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Message-Id: 
 <176317020950.1902092.15007973017309651020.git-patchwork-notify@kernel.org>
Date: Sat, 15 Nov 2025 01:30:09 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Paul Houssel <paulhoussel2@...il.com>
Cc: eddyz87@...il.com, bpf@...r.kernel.org, linux-kselftest@...r.kernel.org,
 linux-kernel@...r.kernel.org, martin.horth@...ecom-sudparis.eu,
 ouail.derghal@...-atlantique.fr, guilhem.jazeron@...ia.fr,
 ludovic.paillat@...ia.fr, robin.theveniaut@...t.fr,
 tristan.daudibert@...il.com, ast@...nel.org, daniel@...earbox.net,
 andrii@...nel.org, martin.lau@...ux.dev, song@...nel.org,
 yonghong.song@...ux.dev, john.fastabend@...il.com, kpsingh@...nel.org,
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 paul.houssel@...nge.com
Subject: Re: [PATCH v4 0/2] libbpf: fix BTF dedup to support recursive typedef

Hello:

This series was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <andrii@...nel.org>:

On Thu, 13 Nov 2025 13:39:49 +0100 you wrote:
> Pahole fails to encode BTF for some Go projects (e.g. Kubernetes and
> Podman) due to recursive type definitions that create reference loops
> not representable in C. These recursive typedefs trigger a failure in
> the BTF deduplication algorithm.
> 
> This patch extends btf_dedup_struct_types() to properly handle potential
> recursion for BTF_KIND_TYPEDEF, similar to how recursion is already
> handled for BTF_KIND_STRUCT. This allows pahole to successfully
> generate BTF for Go binaries using recursive types without impacting
> existing C-based workflows.
> 
> [...]

Here is the summary with links:
  - [v4,1/2] libbpf: fix BTF dedup to support recursive typedef definitions
    https://git.kernel.org/bpf/bpf-next/c/3781413465df
  - [v4,2/2] selftests/bpf: add BTF dedup tests for recursive typedef definitions
    https://git.kernel.org/bpf/bpf-next/c/a69e09823ee9

You are awesome, thank you!
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