net: Eliminate NETIF_F_GEN_CSUM and NETIF_F_V[46]_CSUM

These netif flags are unnecessary convolutions. It is more
straightforward to just use NETIF_F_HW_CSUM, NETIF_F_IP_CSUM,
and NETIF_F_IPV6_CSUM directly.

This patch also:
    - Cleans up can_checksum_protocol
    - Simplifies netdev_intersect_features

Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 6 deletions

diff --git a/include/linux/netdev_features.h b/include/linux/netdev_features.h
index 2c4e94ab88da..d9654f0eecb3 100644
--- a/include/linux/netdev_features.h
+++ b/include/linux/netdev_features.h
@@ -146,15 +146,12 @@ enum {
 #define NETIF_F_GSO_SOFTWARE    (NETIF_F_TSO | NETIF_F_TSO_ECN | \
                                  NETIF_F_TSO6 | NETIF_F_UFO)
 
-#define NETIF_F_GEN_CSUM        NETIF_F_HW_CSUM
-#define NETIF_F_V4_CSUM         (NETIF_F_GEN_CSUM | NETIF_F_IP_CSUM)
-#define NETIF_F_V6_CSUM         (NETIF_F_GEN_CSUM | NETIF_F_IPV6_CSUM)
-
-/* List of IP checksum features. Note that NETIF_HW_CSUM should not be
+/* List of IP checksum features. Note that NETIF_F_ HW_CSUM should not be
  * set in features when NETIF_F_IP_CSUM or NETIF_F_IPV6_CSUM are set--
  * this would be contradictory
  */
-#define NETIF_F_CSUM_MASK       (NETIF_F_V4_CSUM | NETIF_F_V6_CSUM)
+#define NETIF_F_CSUM_MASK       (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | \
+                                 NETIF_F_HW_CSUM)
 
 #define NETIF_F_ALL_TSO         (NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN)