linux-kernel - Re: [RFC PATCH 08/12] PAT 64b: coherent mmap and sysfs bin ioctl

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Message-ID: <20071214060203.GA10100@suse.de>
Date:	Thu, 13 Dec 2007 22:02:03 -0800
From:	Greg KH <gregkh@...e.de>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	venkatesh.pallipadi@...el.com, ak@....de, rdreier@...co.com,
	torvalds@...ux-foundation.org, airlied@...net.ie, davej@...hat.com,
	mingo@...e.hu, tglx@...utronix.de, hpa@...or.com,
	akpm@...ux-foundation.org, arjan@...radead.org,
	jesse.barnes@...el.com, linux-kernel@...r.kernel.org,
	Suresh Siddha <suresh.b.siddha@...el.com>
Subject: Re: [RFC PATCH 08/12] PAT 64b: coherent mmap and sysfs bin ioctl

On Thu, Dec 13, 2007 at 08:59:44PM -0700, Eric W. Biederman wrote:
> venkatesh.pallipadi@...el.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.

Ok, I guess the "use an ioctl on a binary file in sysfs for PCI devices"
makes a bit more sense (hint, next time explain this in the changelog
instead of just saying that it is being added), but I would like to see
how this is all hooked up before passing final judgement on it.

thanks,

greg k-h
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