When building kmod-openvswitch on the latest master branch, the build fails. From the logs it seems like when selecting the kmod-openvswitch during make menuconfig - kmod-nsh is not automatically added as a dependency.
ConfiguCollected errors:
* satisfy_dependencies_for: Cannot satisfy the following dependencies for kmod-openvswitch:
* kmod-nsh
* opkg_install_cmd: Cannot install package kmod-openvswitch
From commit ca81022 it looks like the dependency has been added.
Confirmed the build succeeds when manually selecting the kmod-nsh. Just an FYI for anyone troubleshooting failed builds on 4.14.