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6d26d985ee
Explicitly check if NETFILTER_BPF_LINK is enabled, else configs
that have NETFILTER=y but CONFIG_INET=n fail to link:
> kernel/bpf/syscall.o: undefined reference to `netfilter_prog_ops'
> kernel/bpf/verifier.o: undefined reference to `netfilter_verifier_ops'
Fixes: fd9c663b9a ("bpf: minimal support for programs hooked into netfilter framework")
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/oe-kbuild-all/202304220903.fRZTJtxe-lkp@intel.com/
Signed-off-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/20230422073544.17634-1-fw@strlen.de
Signed-off-by: Alexei Starovoitov <ast@kernel.org>