tun: do not compute the rxhash, if not needed

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Currently, the tun driver, in absence of an eBPF steering program,
always compute the rxhash in its rx path, even when such value
is later unused due to additional checks (

This changeset moves the all the related checks just before the
__skb_get_hash_symmetric(), so that the latter is no more computed
when unneeded.

Also replace an unneeded RCU section with rcu_access_pointer().

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

...

This commit is contained in:

Paolo Abeni 2018-04-20 13:18:16 +02:00 • committed by David S. Miller

parent 496218656f

commit cf1a1e07fc

1 changed files with 6 additions and 9 deletions

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15

drivers/net/tun.c

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