Re: linux-next: Tree for Sep 17 (net/ipv4/devinet.c)

[Stephen Rothwell]

Hi Randy,

On Thu, 17 Sep 2020 13:45:52 -0700 Randy Dunlap <rdun...@infradead.org> wrote:
>
> Maybe some older versions of gcc just can't handle IS_ENABLED() inside an
> if (expression) very well.
> 
> > gcc --version  
> gcc (SUSE Linux) 7.5.0
> 
> This patch:
> 
> commit 9efd6a3cecdde984d67e63d17fe6af53c7c50968
> Author: Nicolas Dichtel <nicolas.dich...@6wind.com>
> Date:   Wed May 13 15:58:43 2020 +0200
> 
>     netns: enable to inherit devconf from current netns
> 
> causes a build error:
> 
> ../net/ipv4/devinet.c: In function ‘devinet_init_net’:
> ../net/ipv4/devinet.c:2672:7: error: ‘sysctl_devconf_inherit_init_net’ 
> undeclared (first use in this function); did you mean ‘devinet_init_net’?
>        sysctl_devconf_inherit_init_net == 3) {
>        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>        devinet_init_net
> ../net/ipv4/devinet.c:2672:7: note: each undeclared identifier is reported 
> only

With your config, can you try creating net/ipv4/devinet.i (preprocessed) file 
and
see if sysctl_devconf_inherit_init_net is actually declared?  I
couldn't see any obvious way it is not, but that would explain the
error.

-- 
Cheers,
Stephen Rothwell

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