tree 0162a188876cd854112e5416d63f79c95721bd46
parent 83af01ba1c2d38d3075b38af2a2116eb1ebe67e6
author Willem de Bruijn <willemb@google.com> 1544268166 -0500
committer David S. Miller <davem@davemloft.net> 1544300780 -0800

ip: silence udp zerocopy smatch false positive

extra_uref is used in __ip(6)_append_data only if uarg is set.

Smatch sees that the variable is passed to sock_zerocopy_put_abort.
This function accesses it only when uarg is set, but smatch cannot
infer this.

Make this dependency explicit.

Fixes: 52900d22288e ("udp: elide zerocopy operation in hot path")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>