Hello:
This patch was applied to bpf/bpf-next.git (master)
by Andrii Nakryiko <andrii@xxxxxxxxxx>:
On Fri, 6 Sep 2024 14:48:14 +0100 you wrote:
> We get this with GCC 15 -O3 (at least):
> ```
> libbpf.c: In function ‘bpf_map__init_kern_struct_ops’:
> libbpf.c:1109:18: error: ‘mod_btf’ may be used uninitialized [-Werror=maybe-uninitialized]
> 1109 | kern_btf = mod_btf ? mod_btf->btf : obj->btf_vmlinux;
> | ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> libbpf.c:1094:28: note: ‘mod_btf’ was declared here
> 1094 | struct module_btf *mod_btf;
> | ^~~~~~~
> In function ‘find_struct_ops_kern_types’,
> inlined from ‘bpf_map__init_kern_struct_ops’ at libbpf.c:1102:8:
> libbpf.c:982:21: error: ‘btf’ may be used uninitialized [-Werror=maybe-uninitialized]
> 982 | kern_type = btf__type_by_id(btf, kern_type_id);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> libbpf.c: In function ‘bpf_map__init_kern_struct_ops’:
> libbpf.c:967:21: note: ‘btf’ was declared here
> 967 | struct btf *btf;
> | ^~~
> ```
>
> [...]
Here is the summary with links:
- libbpf: workaround (another) -Wmaybe-uninitialized false positive
https://git.kernel.org/bpf/bpf-next/c/8a3f14bb1e94
You are awesome, thank you!
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