Re: [Xen-devel] [PATCH for-4.5 7/8] xen/irq: Handle multiple action per IRQ

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2014-04-01 at 14:13 +0100, Julien Grall wrote:
> >>    - I need to use 2 variables to search for an element in a list as there 
> >> is
> >>    no way to know after the end of the loop if we found or not an element.
> > 
> > You've written that a bit weirdly IMHO.
> > 
> > list_for_each(...)
> >    if (not the one we want)
> >     continue
> >    free the one we wanted
> >    break;
> > 
> > don't worry about warning on a non-existent IRQ, or set a simple
> > boolean.
> 
> We have to worry about non-existent action otherwise Xen may segfault...

Why? If it doesn't exist we don't do anything.



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