linux-kernel - [BUG] Devices breaking due to CONFIG_ZONE

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Date:	Sat, 23 Jan 2016 10:16:43 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Dan Williams <dan.j.williams@...el.com>,
	Christoph Hellwig <hch@....de>
Cc:	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Jerome Glisse <j.glisse@...il.com>, markk@...ra.co.uk,
	jroedel@...e.de, bp@...e.de, linux-kernel@...r.kernel.org
Subject: [BUG] Devices breaking due to CONFIG_ZONE_DEVICE

Hi All,
Commit 033fbae988fc ("mm: ZONE_DEVICE for "device memory"") has
introduced CONFIG_ZONE_DEVICE while sacrificing CONFIG_ZONE_DMA.
Distributions like Ubuntu has started enabling CONFIG_ZONE_DEVICE and
thus breaking parallel port. Please have a look at
https://bugzilla.kernel.org/show_bug.cgi?id=110931 for the bug report.

Apart from parallel port I can see some sound drivers will also break.

Now what is the possible solution for this?

Regards
Sudip