linux-kernel - Re: [PATCH] mm: Export symbols unmapped_area() & unmapped_area

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Date:	Wed, 16 Mar 2016 13:36:57 -0700
From:	Christoph Hellwig <hch@...radead.org>
To:	Olu Ogunbowale <Olu.Ogunbowale@...tec.com>
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Michel Lespinasse <walken@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rik van Riel <riel@...hat.com>,
	Hugh Dickins <hughd@...gle.com>,
	Russell King <linux@....linux.org.uk>,
	Ralf Baechle <ralf@...ux-mips.org>,
	Paul Mundt <lethal@...ux-sh.org>,
	"David S. Miller" <davem@...emloft.net>,
	Chris Metcalf <cmetcalf@...era.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] mm: Export symbols unmapped_area() &
 unmapped_area_topdown()

On Wed, Mar 16, 2016 at 05:10:34PM +0000, Olu Ogunbowale wrote:
> From: Olujide Ogunbowale <Olu.Ogunbowale@...tec.com>
> 
> Export the memory management functions, unmapped_area() &
> unmapped_area_topdown(), as GPL symbols; this allows the kernel to
> better support process address space mirroring on both CPU and device
> for out-of-tree drivers by allowing the use of vm_unmapped_area() in a
> driver's file operation get_unmapped_area().

No new exports without in-tree drivers.  How about you get started
to get your drives into the tree first?