netdev - Re: link failures with bpf_map_xxx_elem_proto calls from net/core/filiter.c

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Date:	Thu, 05 Mar 2015 20:04:05 +0100
From:	Daniel Borkmann <daniel@...earbox.net>
To:	Or Gerlitz <ogerlitz@...lanox.com>
CC:	Alexei Starovoitov <ast@...mgrid.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: link failures with bpf_map_xxx_elem_proto calls from net/core/filiter.c

On 03/04/2015 09:42 AM, Or Gerlitz wrote:
> Hi Daniel,
>
> With net-next (and probably net or Linus tree too), I am getting these link failures
>
> net/built-in.o:(.rodata+0x2210): undefined reference to `bpf_map_lookup_elem_proto'
> net/built-in.o:(.rodata+0x2218): undefined reference to `bpf_map_update_elem_proto'
> net/built-in.o:(.rodata+0x2220): undefined reference to `bpf_map_delete_elem_proto'
>
> which are resolved when CONFIG_BPF_SYSCALL is added to the kernel config, I see now t hat this 4.0-rc1 commit d4052c4aea0cf "ebpf: remove CONFIG_BPF_SYSCALL ifdefs in socket filter code" removed the ifdefing, not sure what does "BPF internal header can deal with it" means.

Sorry, I was travelling whole day yesterday.

Will send out a patch today.

Thanks,
Daniel
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