1 files changed, 7 insertions, 2 deletions

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 9b2957d203c9..910560e85561 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -205,7 +205,9 @@ typedef unsigned char *sk_buff_data_t;
  *      @len: Length of actual data
  *      @data_len: Data length
  *      @mac_len: Length of link layer header
- *      @csum: Checksum
+ *      @csum: Checksum (must include start/offset pair)
+ *      @csum_start: Offset from skb->head where checksumming should start
+ *      @csum_offset: Offset from csum_start where checksum should be stored
  *      @local_df: allow local fragmentation
  *      @cloned: Head may be cloned (check refcnt to be sure)
  *      @nohdr: Payload reference only, must not modify header
@@ -261,7 +263,10 @@ struct sk_buff {
                                 mac_len;
         union {
                 __wsum          csum;
-                __u32           csum_offset;
+                struct {
+                        __u16   csum_start;
+                        __u16   csum_offset;
+                };
         };
         __u32                   priority;
         __u8                    local_df:1,