Russell King - ARM Linux <[email protected]> writes: > On Fri, Sep 26, 2014 at 11:29:56AM +0200, Thomas Gleixner wrote: >> On Thu, 25 Sep 2014, Kevin Hilman wrote: >> > Maybe I'm missing something, or maybe we're just lucky and nobody uses >> > them together, but irq_set_affinity_notifier() only allows a single >> > notifier to be registered at any given time. So if you had a system >> >> A single notifier per irq ..... > > So what about two drivers wanting to use this notifier, but sharing an > interrupt? > > It sounds to me like this notifier was misdesigned from the very start, > and it should always have supported multiple notifiers.
I agree. $SUBJECT patch tries to add that support, and is part of a series wanting to use these notifiers in the PM QoS subsystem, while at the same time not breaking existing users. I suppose this series could be written without $SUBJECT patch, and crossing fingers in the hopes that an existing user of the notifiers doesn't also need to use the pm_qos constraints, but that seems like knowingly leaving an armed landmine laying around. Kevin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
