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-rw-r--r--include/linux/ethtool.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index c8e3e7e39c6b..0a114d05f68d 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -183,6 +183,9 @@ static inline u32 ethtool_rxfh_indir_default(u32 index, u32 n_rx_rings)
* hold the RTNL lock.
*
* See the structures used by these operations for further documentation.
+ * Note that for all operations using a structure ending with a zero-
+ * length array, the array is allocated separately in the kernel and
+ * is passed to the driver as an additional parameter.
*
* See &struct net_device and &struct net_device_ops for documentation
* of the generic netdev features interface.