On 9/17/20 3:23 AM, Stephen Rothwell wrote: > Hi all, > > Changes since 20200916: > 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.dichtel@xxxxxxxxx> 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 -- ~Randy Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>