The __ethtool_get_link_ksettings is currently used only for kernels >= 3.15. But the compat code is read by the compiler for each kernel. But kernels up to 3.1 never had the function __ethtool_get_settings which is used to emulate this function for kernels < 4.6. Therefore, kernels < 3.2 will fail to compile when this compatibility layer is enabled.

Fixes: 3515604d82d5 ("batman-adv: ELP - use new ethtool_link_get_ksettings API") Signed-off-by: Sven Eckelmann sven@narfation.org --- compat-include/linux/ethtool.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/compat-include/linux/ethtool.h b/compat-include/linux/ethtool.h index 87f7577..a24390a 100644 --- a/compat-include/linux/ethtool.h +++ b/compat-include/linux/ethtool.h @@ -24,7 +24,9 @@ #include <linux/version.h> #include_next <linux/ethtool.h>

-#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0) +/* WARNING only enabled on kernels with __ethtool_get_settings support */ +#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0) && \ + LINUX_VERSION_CODE >= KERNEL_VERSION(3, 1, 0)

#define ethtool_link_ksettings batadv_ethtool_link_ksettings