Yonghong Song d848bba680
bpf: Remove special_kfunc_set from verifier ...
Currently, the verifier has both special_kfunc_set and special_kfunc_list.
When adding a new kfunc usage to the verifier, it is often confusing
about whether special_kfunc_set or special_kfunc_list or both should
add that kfunc. For example, some kfuncs, e.g., bpf_dynptr_from_skb,
bpf_dynptr_clone, bpf_wq_set_callback_impl, does not need to be
in special_kfunc_set.
To avoid potential future confusion, special_kfunc_set is deleted
and btf_id_set_contains(&special_kfunc_set, ...) is removed.
The code is refactored with a new func check_special_kfunc(),
which contains all codes covered by original branch
meta.btf == btf_vmlinux && btf_id_set_contains(&special_kfunc_set, meta.func_id)
There is no functionality change.
Signed-off-by: Yonghong Song <yonghong.song@linux.dev >
Link: https://lore.kernel.org/r/20250523205321.1291431-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org >
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d848bba680