linux-kernel - Re: [PATCH] cgroup: move CONFIG_SOCK_CGROUP

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Date:   Wed, 11 Jan 2017 09:48:20 -0500 (EST)
From:   David Miller <davem@...emloft.net>
To:     arnd@...db.de
Cc:     netdev@...r.kernel.org, ast@...nel.org, luto@...nel.org,
        augustocaringi@...il.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] cgroup: move CONFIG_SOCK_CGROUP_DATA to init/Kconfig

From: Arnd Bergmann <arnd@...db.de>
Date: Tue, 10 Jan 2017 13:08:06 +0100

> We now 'select SOCK_CGROUP_DATA' but Kconfig complains that this is
> not right when CONFIG_NET is disabled and there is no socket interface:
> 
> warning: (CGROUP_BPF) selects SOCK_CGROUP_DATA which has unmet direct dependencies (NET)
> 
> I don't know what the correct solution for this is, but simply removing
> the dependency on NET from SOCK_CGROUP_DATA by moving it out of the
> 'if NET' section avoids the warning and does not produce other build
> errors.
> 
> Fixes: 483c4933ea09 ("cgroup: Fix CGROUP_BPF config")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
> There was an earlier patch by Augusto Mecking Caringi, which added
> a dependency, see https://lkml.org/lkml/2017/1/2/296.
> 
> I could not figure out whether CGROUP_BPF is meaningful without
> CONFIG_NET, my version of the patch assumes that it is.
> Applying either my version Augusto's to v4.10-rc will kill the
> warning.

CGROUP_BPF doesn't is not currently meaningful without CONFIG_NET,
and especially SOCK_CGROUP_DATA is not meaningful without CONFIG_NET.

Patch applied, thanks.