linux-kernel - Re: [PATCH bpf-next v3] bpf: Only provide bpf_sock_from_file with CONFIG

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Date:   Tue, 8 Dec 2020 12:54:58 -0800
From:   Martin KaFai Lau <kafai@...com>
To:     Florent Revest <revest@...omium.org>
CC:     <bpf@...r.kernel.org>, <ast@...nel.org>, <daniel@...earbox.net>,
        <andrii@...nel.org>, <kpsingh@...omium.org>,
        <rdunlap@...radead.org>, <linux-next@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH bpf-next v3] bpf: Only provide bpf_sock_from_file with
 CONFIG_NET

On Tue, Dec 08, 2020 at 06:36:23PM +0100, Florent Revest wrote:
> This moves the bpf_sock_from_file definition into net/core/filter.c
> which only gets compiled with CONFIG_NET and also moves the helper proto
> usage next to other tracing helpers that are conditional on CONFIG_NET.
> 
> This avoids
>   ld: kernel/trace/bpf_trace.o: in function `bpf_sock_from_file':
>   bpf_trace.c:(.text+0xe23): undefined reference to `sock_from_file'
> When compiling a kernel with BPF and without NET.
Acked-by: Martin KaFai Lau <kafai@...com>