linux-kernel - Re: [PATCH] mm/nommu.c: fix mmap failed due to the vm

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Date:	Thu, 24 Sep 2009 13:29:46 +0100
From:	David Howells <dhowells@...hat.com>
To:	graff.yang@...il.com
Cc:	dhowells@...hat.com, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, uclinux-dist-devel@...ckfin.uclinux.org,
	graf.yang@...log.com
Subject: Re: [PATCH] mm/nommu.c: fix mmap failed due to the vm_region codes

<graff.yang@...il.com> wrote:

> Due to the new vm_region codes, mmap will failed if it is MAP_PRIVATE,
> or the get_unmapped_area() not do actual things.

Hmmm...  Seems one of my debugging patches had a work around for this - all it
did was #ifdef-out the first if-statement in do_mmap_private().  That, however,
prevents XIP.

Sadly, your patch doesn't completely fix the problem either.  The BUG in
add_nommu_region() barks.

Let me poke at it some more.

David
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