epoll patch for review

[Roman Divacky]

> >I am not sure if its semantically correct, it seems to work for my testing
> >program. I'll remove the comment.
> 
> I'm not sure your testing program covers all cases. So just removing  
> the comment to make me happy is not the right thing to do. :)
 
I tested this flag and it did the same thing on linux and on linuxulator :)

> 
> What I meant was: linux supports the MOD so we should support it too.  
> You already thought about it (ADD+DEL), so think a little bit more and  
> finish it (it doesn't look like it is a lot of code to write for  
> this). And as a second thought: the action to do may depend upon the  
> modification requested (when it is in fact a null op, we should maybe  
> do just nothing)...
 
things can always be added later. I'd prefer to commit solution for
95% of the problems now instead of solution for 100% in 2012

> Oh... with fc4 or f7? What's the lib? Maybe we (bsam and/or me) can a  
> find it and add it as a port.
 
check ltp-full-20061121/testcases/kernel/syscalls/epoll/README.1ST

it needs some couroutine library etc.

> >thnx for the review I'll fix things and post updated version in a few days
> 
> Many thanks for working at this!

sure.... happy to be useful ;)

roman