tree b4d7d338f3ace293b905014afc70afc3189a89ff
parent 080b3c19a4ffe4677d7449880f4d0cea07182474
author Eric W. Biederman <ebiederm@xmission.com> 1395960140 -0700
committer David S. Miller <davem@davemloft.net> 1396130317 -0400

netpoll: Respect NETIF_F_LLTX

Stop taking the transmit lock when a network device has specified
NETIF_F_LLTX.

If no locks needed to trasnmit a packet this is the ideal scenario for
netpoll as all packets can be trasnmitted immediately.

Even if some locks are needed in ndo_start_xmit skipping any unnecessary
serialization is desirable for netpoll as it makes it more likely a
debugging packet may be trasnmitted immediately instead of being
deferred until later.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>