Re: [RFC,PATCH] use rcu for fasync_lock

[Manfred Spraul]

Jamie Lokier wrote:

> I don't think you need to change pollwait or ->poll, because the band
> information for the signal is available, as you say, by calling ->poll
> after the wakeup.
I'm not convinced:
The wakeup happens at irq time. The band info is necessary for 
send_sigio(). Calling f_poll at irq time is not an option - it will 
definitively cause breakage. schedule_work() for every call is IMHO not 
an option. And even that is not reliable: fasync users might expect 
seperate POLL_OUT and POLL_IN signals.


--
   Manfred


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