Re: [PATCH 6.1&6.6 3/3] btf: Avoid weak external references

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

The upstream commit SHA1 provided is correct: fc5eb4a84e4c063e75a6a6e92308e9533c0f19b5

WARNING: Author mismatch between patch and upstream commit:
Backport author: Huacai Chen <chenhuacai@loongson.cn>
Commit author: Ard Biesheuvel <ardb@kernel.org>


Status in newer kernel trees:
6.12.y | Present (exact SHA1)
6.6.y | Not found

Note: The patch differs from the upstream commit:
---
1:  fc5eb4a84e4c0 ! 1:  0637e4a3f4e0a btf: Avoid weak external references
    @@ Metadata
      ## Commit message ##
         btf: Avoid weak external references
     
    +    [ Upstream commit fc5eb4a84e4c063e75a6a6e92308e9533c0f19b5 ]
    +
         If the BTF code is enabled in the build configuration, the start/stop
         BTF markers are guaranteed to exist. Only when CONFIG_DEBUG_INFO_BTF=n,
         the references in btf_parse_vmlinux() will remain unsatisfied, relying
    @@ Commit message
         Acked-by: Arnd Bergmann <arnd@arndb.de>
         Acked-by: Jiri Olsa <jolsa@kernel.org>
         Link: https://lore.kernel.org/bpf/20240415162041.2491523-8-ardb+git@google.com
    +    Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
     
      ## kernel/bpf/btf.c ##
     @@ kernel/bpf/btf.c: static struct btf *btf_parse(const union bpf_attr *attr, bpfptr_t uattr, u32 uat
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.6.y        |  Success    |  Success   |
| stable/linux-6.1.y        |  Success    |  Success   |