Linux PCI subsystem development
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From: Arnd Bergmann <arnd@arndb.de>
To: Liviu Dudau <liviu.dudau@arm.com>
Cc: Thierry Reding <thierry.reding@gmail.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Tomasz Nowicki <tn@semihalf.com>,
	linux-pci@vger.kernel.org, linux-tegra@vger.kernel.org
Subject: Re: [PATCH v2 1/2] PCI: Add new method for registering PCI hosts
Date: Fri, 01 Jul 2016 17:17:11 +0200	[thread overview]
Message-ID: <14945085.QO6LcyFgTY@wuerfel> (raw)
In-Reply-To: <20160701145244.GD8609@e106497-lin.cambridge.arm.com>

On Friday, July 1, 2016 3:52:44 PM CEST Liviu Dudau wrote:
> 
> > 
> > or do you mean we should have extra alignment in there so the
> > private pointer has a minimum alignment higher than the
> > alignment of struct pci_host_bridge?
> 
> but this ^. bridge pointer arithmetic means +1 is not necessarily +sizeof(struct pci_host_bridge)
> bytes. AFAIK that can be rounded to the nearest natural alignment for pointers on that
> architecture.

No, that's not how it works.

> > I'm absolutely fine with any of those suggestions, whichever
> > makes the nicest API.
> 
> Does anyone need to subclass the pci_host_bridge structure? And is appending data right
> after the structure useful?

I was basically following the way alloc_etherdev() and a lot of other
subsystems handle it.

	Arnd

  reply	other threads:[~2016-07-01 15:23 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-30 15:19 [PATCH v2 1/2] PCI: Add new method for registering PCI hosts Thierry Reding
2016-06-30 15:19 ` [PATCH v2 2/2] PCI: tegra: Use new pci_register_host() interface Thierry Reding
2016-06-30 15:37 ` [PATCH v2 1/2] PCI: Add new method for registering PCI hosts Arnd Bergmann
2016-07-01 14:14   ` Liviu Dudau
2016-07-01 14:24     ` Arnd Bergmann
2016-07-01 14:52       ` Liviu Dudau
2016-07-01 15:17         ` Arnd Bergmann [this message]
2016-07-01 15:40           ` Liviu Dudau
2016-07-01 15:58             ` Arnd Bergmann
2016-07-01 14:46 ` Liviu Dudau
2016-07-01 15:44   ` Arnd Bergmann
2016-07-01 16:09     ` Liviu Dudau
2016-07-01 16:30       ` Arnd Bergmann
2016-07-04  9:56         ` Liviu Dudau
2016-07-04 13:46           ` Arnd Bergmann
2016-07-28 20:43 ` Bjorn Helgaas

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