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 <rdunlap@xxxxxxxxxxxxx> Cc: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> Cc: K. Y. Srinivasan <kys@xxxxxxxxxxxxx> Cc: Wei Liu <wei.liu@xxxxxxxxxx> Cc: Dexuan Cui <decui@xxxxxxxxxxxxx> Cc: linux-hyperv@xxxxxxxxxxxxxxx Cc: David S. Miller <davem@xxxxxxxxxxxxx> Cc: Eric Dumazet <edumazet@xxxxxxxxxx> Cc: Jakub Kicinski <kuba@xxxxxxxxxx> Cc: Paolo Abeni <pabeni@xxxxxxxxxx> Cc: netdev@xxxxxxxxxxxxxxx Reviewed-by: Simon Horman <horms@xxxxxxxxxx> Tested-by: Simon Horman <horms@xxxxxxxxxx> # build-tested Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx> --- 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.