From mboxrd@z Thu Jan  1 00:00:00 1970
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Thu, 25 Jun 2015 22:51:58 +0000
Subject: Re: [PATCH v7 5/9] PCI: Add pci_iomap_wc() variants
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To: Casey Leedom <leedom@chelsio.com>
Cc: Arnd Bergmann <arnd@arndb.de>, "Luis R. Rodriguez" <mcgrof@suse.com>, "Michael S. Tsirkin" <mst@redhat.com>, Bjorn Helgaas <bhelgaas@google.com>, Toshi Kani <toshi.kani@hp.com>, Andy Lutomirski <luto@amacapital.net>, Juergen Gross <jgross@suse.com>, Tomi Valkeinen <tomi.valkeinen@ti.com>, "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, linux-fbdev <linux-fbdev@vger.kernel.org>, Suresh Siddha <sbsiddha@gmail.com>, Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>, Daniel Vetter <daniel.vetter@ffwll.ch>, Dave Airlie <airlied@redhat.com>, Antonino Daplas <adaplas@gmail.com>, Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>, Dave Hansen <dave.hansen@linux.intel.com>, "venkatesh.pallipadi@intel.com" <venkatesh.pallipadi@intel.com>, Stefan Bader <stefan.bader@canonical.com>, ville.syrjala@linux.intel.com, David Vrabel <david.vrabel@citrix.com>, Jan Beulich <jbeulich@suse.com>, Roger Pau =?ISO-8859-1?Q?Monn=E9?= <roger.pau@citrix.com>

On Thu, 2015-06-25 at 21:40 +0000, Casey Leedom wrote:
> Hhmmm, so what do PowerPC Drivers do when they want to take
> advantage of Write Combining?  Do their own Endian Swizzling
> with the __raw_*() APIs?

Yeah either, we need to fix our relaxed implementation (patch
welcome :-)

Cheers,
Ben.