[PATCH 1/2] PCI: Provide sensible irq vector alloc/free routines

[Christoph Hellwig]

On Fri, May 06, 2016 at 11:35:10AM -0500, Bjorn Helgaas wrote:
> I don't know what sort of clues you'll need for IRQ spreading, but
> that sounds like a good reason for the argument.  So if you will need
> the flags argument for something else, then I think it's OK as-is.  

The basic idea is that we want to spread the MSI(-X) vectors around
properly right when allocating them.  See the series around this
patch when I last posted it.  For for now various drivers use different
ways of spreading them, so we'll need to make it opt-in in the beginning.

In the long run we'll hopefully have everyone converted to the common
algorithm and can get rid of the flag, but that might take a while.