tun: avoid unnecessary READ_ONCE in tun_net_xmit
authorWillem de Bruijn <willemb@google.com>
Wed, 6 Dec 2017 03:11:17 +0000 (22:11 -0500)
committerDavid S. Miller <davem@davemloft.net>
Wed, 6 Dec 2017 20:09:13 +0000 (15:09 -0500)
commitcc166427dcdab39a96140fded18ac23be5f0a1ed
tree3e7b0e2a412e37f7a5a4e9000c496de3ecb9a633
parentd9b8693783e8a1ce8e4495d13d1dd6d8081f5070
tun: avoid unnecessary READ_ONCE in tun_net_xmit

The statement no longer serves a purpose.

Commit fa35864e0bb7 ("tuntap: Fix for a race in accessing numqueues")
added the ACCESS_ONCE to avoid a race condition with skb_queue_len.

Commit 436accebb530 ("tuntap: remove unnecessary sk_receive_queue
length check during xmit") removed the affected skb_queue_len check.

Commit 96f84061620c ("tun: add eBPF based queue selection method")
split the function, reading the field a second time in the callee.
The temp variable is now only read once, so just remove it.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/tun.c