rndis_filter uses utf8s_to_utf16s() which is provided by setting NLS, so select NLS to fix the build error:
ERROR: modpost: "utf8s_to_utf16s" [drivers/net/hyperv/hv_netvsc.ko] undefined! Fixes: 1ce09e899d28 ("hyperv: Add support for setting MAC from within guests") Signed-off-by: Randy Dunlap <rdun...@infradead.org> Cc: Haiyang Zhang <haiya...@microsoft.com> Cc: K. Y. Srinivasan <k...@microsoft.com> Cc: Wei Liu <wei....@kernel.org> Cc: Dexuan Cui <de...@microsoft.com> Cc: linux-hyperv@vger.kernel.org Cc: David S. Miller <da...@davemloft.net> Cc: Eric Dumazet <eduma...@google.com> Cc: Jakub Kicinski <k...@kernel.org> Cc: Paolo Abeni <pab...@redhat.com> Cc: net...@vger.kernel.org Reviewed-by: Simon Horman <ho...@kernel.org> Tested-by: Simon Horman <ho...@kernel.org> # build-tested Reviewed-by: Michael Kelley <mikel...@microsoft.com> --- v2: correct Subject prefix (Michael) drivers/net/hyperv/Kconfig | 1 + 1 file changed, 1 insertion(+) diff -- a/drivers/net/hyperv/Kconfig b/drivers/net/hyperv/Kconfig --- a/drivers/net/hyperv/Kconfig +++ b/drivers/net/hyperv/Kconfig @@ -3,5 +3,6 @@ config HYPERV_NET tristate "Microsoft Hyper-V virtual network driver" depends on HYPERV select UCS2_STRING + select NLS help Select this option to enable the Hyper-V virtual network driver.