Re: pcilynx: aux_poll question

[Andreas B. <and...@mu...>]

On Sun, Apr 23, 2000 at 12:10:55PM +0200, Manfred Spraul wrote:
> Linus made a last minute SMP change:
> 
> 	f_op->poll now runs without lock_kernel().
> 
> I currently try to verify all _poll functions, and don't understand
> aux_poll: what's the purpose of 
> 
> 	md->aux_intr_last_seen++;

Makes poll return POLLPRI one time for each interrupt that was
received from some special channel on the PCILynx (even if the last
poll lies a few interrupts in the past).

It's not part of IEEE 1394 functionality, it's just some special
features of the PCILynx that I need to support.
 
> A normal "++" isn't SMP safe, so either lock_kernel() should be added,
> or aux_intr_last_seen could be converted to an atomic_t variable.

Thanks, will be done.

-- 
 Andreas E. Bombe <and...@mu...>    DSA key 0x04880A44
http://home.pages.de/~andreas.bombe/    http://linux1394.sourceforge.net/