net: make struct net_device::tx_queue_len unsigned int
authorAlexey Dobriyan <adobriyan@gmail.com>
Wed, 17 May 2017 10:30:44 +0000 (13:30 +0300)
committerDavid S. Miller <davem@davemloft.net>
Thu, 18 May 2017 14:19:30 +0000 (10:19 -0400)
commit0cd2950357e31a96be03b531b4b11fe1df812c9f
treeb9587e64729dee6f52b5c07867c1acc3df805fe1
parent64f5102dcb811b27d673eccc8cc0d76ce90981a4
net: make struct net_device::tx_queue_len unsigned int

4 billion packet queue is something unthinkable so use 32-bit value
for now.

Space savings on x86_64:

add/remove: 0/0 grow/shrink: 3/70 up/down: 16/-131 (-115)
function                                     old     new   delta
change_tx_queue_len                           94     108     +14
qdisc_create                                1176    1177      +1
alloc_netdev_mqs                            1124    1125      +1
xenvif_alloc                                 533     532      -1
x25_asy_setup                                167     166      -1
...
tun_queue_resize                             945     940      -5
pfifo_fast_enqueue                           167     162      -5
qfq_init_qdisc                               168     158     -10
tap_queue_resize                             810     799     -11
transmit                                     719     698     -21

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/wan/hdlc_raw_eth.c
include/linux/netdevice.h
net/core/net-sysfs.c
net/core/rtnetlink.c