[RFC PATCH v3 0/2] can: join filters with per-CPU variables

[Oliver Hartkopp <socketcan@hartkopp.net>]

Hi all,

as Andre Naujoks found some problems in my first patches with multi-threading
I did some investigation how to handle variables to be written inside the
NET_RX softirq without locking. As far as I was able to test this code it works
properly now - even with the multi-thread test from Andre.

If you know how to use per-CPU variables inside NET_RX softirq I would
appreciate your review as I'm not that sure that the per-CPU code is correct.
It's my first time using this technique and is only what I was able to get from
other code examples and available kernel docs.

Many thanks,
Oliver

Changes v1 -> v2:
* Introduce per-CPU variables

Changes v2 -> v3:
* Fix style issues remarked by Sergei Shtylyov and Marc Kleine-Budde
* Indroduced a per-CPU struct as suggested by Marc Kleine-Budde
* omitted the obsolete per-CPU struct data initialization as alloc_percpu
  provides already zero'ed memory 


Oliver Hartkopp (2):
  can: fix multiple delivery of a single CAN frame for overlapping CAN
    filters
  can: introduce new raw socket option to join the given CAN filters

 Documentation/networking/can.txt | 20 ++++++++++++++--
 include/uapi/linux/can/raw.h     |  1 +
 net/can/raw.c                    | 50 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 69 insertions(+), 2 deletions(-)

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2.1.4