On Fri, 2015-05-01 at 15:46 +0200, Arend van Spriel wrote:
> Commit 5a490510ba5f ("mac80211: use per-CPU TX/RX statistics") introduced
> the use of per-cpu statistics, ie. struct netdevice::tstats. This is not
> supported in kernel 3.14 and older.
>
> Signed-off-by: Arend van Spriel <arend@xxxxxxxxxxxx>
> ---
> I am not entirely sure whether 3.14 is the correct version to check for. The
> functionality seems introduced there but there were some subsequent patches
> on the per-cpu netdev stats functionality.
I don't really like just reverting to the old behaviour - that'll make
this very hard to port.
What part of this isn't supported? Is there no pointer whatsoever that
we can use? We still implement the ndo_getstats64 [or whatever it's
called] ourselves anyway, so we don't really use any API here apart from
* netdev_alloc_pcpu_stats, which is trivially backported
* dev->tstats, which is just a single pointer and we could use anything
else,
even perhaps in sdata
johannes
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