linux-kernel - Re: [RFC 00/15] PCI: turn some _

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Date:   Tue, 21 Aug 2018 06:14:41 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     David Woodhouse <dwmw2@...radead.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Arnd Bergmann <arnd@...db.de>, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        linux-kernel@...r.kernel.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        linuxppc-dev@...ts.ozlabs.org, linux-acpi@...r.kernel.org
Subject: Re: [RFC 00/15] PCI: turn some __weak functions into callbacks

On Tue, Aug 21, 2018 at 12:30:50PM +0100, David Woodhouse wrote:
> On Mon, 2018-08-20 at 23:14 -0700, Christoph Hellwig wrote:
> > On Fri, Aug 17, 2018 at 12:26:30PM +0200, Arnd Bergmann wrote:
> > > Hi Bjorn and others,
> > > 
> > > Triggered by Christoph's patches, I had another go at converting
> > > all of the remaining pci host bridge implementations to be based
> > > on pci_alloc_host_bridge and a separate registration function.
> > 
> > I really like the idea behind this series.
> 
> Hm... are you turning direct calls into retpolined indirect calls?

He does.  But not anywhere near the fast path.