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Netlink helpers I added in 8bbb77b7c7a2 ("libbpf: Add various netlink helpers") used char * casts everywhere, and there were a few more that existed from before. Convert all of them to void * cast, as it is treated equivalently by clang/gcc for the purposes of pointer arithmetic and to follow the convention elsewhere in the kernel/libbpf. Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20210619041454.417577-2-memxor@gmail.com