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Date: Thu, 6 Mar 2003 14:52:23 -0800
From: Andrew Morton <akpm@digeo.com>
To: Hugh Dickins <hugh@veritas.com>
Cc: vandrove@vc.cvut.cz, helgehaf@aitel.hist.no, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] vm_area_struct slab corruption
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Hugh Dickins <hugh@veritas.com> wrote:
>
> +	 * Note: mremap's move_vma VM_ACCOUNT handling assumes a partially
> +	 * unmapped vm_area_struct will remain in use: so lower split_vma
> +	 * places tmp vma above, and higher split_vma places tmp vma below.

Cough.  Would it be clearer to just return the address of the surviving vma
from do_munmap()?  Via an extra arg, or a PTR_ERR thingy?