[PATCH] net: make struct net_device::min_header_len 8-bit

[Alexey Dobriyan]

This field is never big enough to warrant 16-bitness.

8-bit accesses enjoy shorted encoding on i386/x86_64 than 16-bit
accesses:

        add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-10 (-10)
        function                                     old     new   delta
        loopback_setup                               169     164      -5
        ether_setup                                  148     143      -5

Signed-off-by: Alexey Dobriyan <adobri...@gmail.com>
---

 include/linux/netdevice.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1715,7 +1715,7 @@ struct net_device {
        unsigned int            max_mtu;
        unsigned short          type;
        unsigned short          hard_header_len;
-       unsigned short          min_header_len;
+       unsigned char           min_header_len;
 
        unsigned short          needed_headroom;
        unsigned short          needed_tailroom;