devlink: share user_ptr pointer for both devlink and devlink_port
Ptr to devlink structure can be easily obtained from devlink_port->devlink. So share user_ptr[0] pointer for both and leave user_ptr[1] free for other users. Signed-off-by: NJiri Pirko <jiri@mellanox.com> Reviewed-by: NIdo Schimmel <idosch@mellanox.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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