From: ebiederm@xmission.com (Eric W. Biederman)
To: venkatesh.pallipadi@intel.com
Cc: ak@muc.de, ebiederm@xmission.com, rdreier@cisco.com,
       torvalds@linux-foundation.org, gregkh@suse.de, airlied@skynet.ie,
       davej@redhat.com, mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com,
       akpm@linux-foundation.org, arjan@infradead.org, jesse.barnes@intel.com,
       linux-kernel@vger.kernel.org, Suresh Siddha <suresh.b.siddha@intel.com>
Subject: Re: [RFC PATCH 08/12] PAT 64b: coherent mmap and sysfs bin ioctl
References: <20071213235543.568682000@intel.com>
	<20071213235712.813201000@intel.com>
Date: Thu, 13 Dec 2007 20:59:44 -0700
In-Reply-To: <20071213235712.813201000@intel.com> (venkatesh pallipadi's
	message of "Thu, 13 Dec 2007 15:55:51 -0800")
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venkatesh.pallipadi@intel.com writes:

> Forward port of coherent-mmap.patch and sysfs-bin-ioctl.patch to x86 tree.
>
> TBD: Do we need the ioctl interface to sysfs or get the type attribute
> through a different sysfs file. And then actually specify the attribute
> while doing pci_mmap_page_range ;-)

This ioctl is not connected up.  So regardless of the wisdom of ioctls on
sysfs adding the infrastructure and then not using it is broken.

> And when this interface is in place, X server has to use this interface for WC
> mapping.

Eric
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