linux-kernel - Re: nommu: Add new vmalloc_user() and remap_vmalloc

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Date:	Wed, 28 Nov 2007 14:39:57 +0000
From:	David Howells <dhowells@...hat.com>
To:	Paul Mundt <lethal@...ux-sh.org>
Cc:	dhowells@...hat.com, Andrew Morton <akpm@...ux-foundation.org>,
	Greg Ungerer <gerg@...pgear.com>,
	David McCullough <david_mccullough@...securecomputing.com>,
	linux-kernel@...r.kernel.org
Subject: Re: nommu: Add new vmalloc_user() and remap_vmalloc_range() interfaces.

Paul Mundt <lethal@...ux-sh.org> wrote:

> This builds on top of the earlier vmalloc_32_user() work introduced by
> b50731732f926d6c49fd0724616a7344c31cd5cf, as we now have places in the
> nommu allmodconfig that hit up against these missing APIs.
> 
> As vmalloc_32_user() is already implemented, this is moved over to
> vmalloc_user() and simply made a wrapper. As all current nommu platforms
> are 32-bit addressable, there's no special casing we have to do for
> ZONE_DMA and things of that nature as per GFP_VMALLOC32.
> 
> remap_vmalloc_range() needs to check VM_USERMAP in order to figure out
> whether we permit the remap or not, which means that we also have to
> rework the vmalloc_user() code to grovel for the VMA and set the flag.

Acked-by: David Howells <dhowells@...hat.com>
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