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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2017-04-10 11:25:26 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-04-12 20:59:21 +0300 |
| commit | d92be7a41ef15463eb816a4a2d42bf094b56dfce (patch) | |
| tree | 0836d0005942438fc753a88d23a2dcc96b551084 | |
| parent | 5b3dc2f37d7daf76a679cd204492ec5dff06bb8a (diff) | |
| download | linux-d92be7a41ef15463eb816a4a2d42bf094b56dfce.tar.xz | |
net: make struct net_device::min_header_len 8-bit
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 <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/linux/netdevice.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 8ea8a8b70755..b0aa089ce67f 100644 --- 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; |