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Date: Wed, 17 Nov 2004 18:02:15 -0800
From: William Lee Irwin III <wli@holomorphy.com>
To: Thiago Robert dos Santos <robert@lisha.ufsc.br>
Cc: linux-kernel@vger.kernel.org
Subject: Re: remap_page_range
Message-ID: <20041118020215.GA3217@holomorphy.com>
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On Wed, Nov 17, 2004 at 06:43:46PM -0200, Thiago Robert dos Santos wrote:
>   I'm having a problem with remap_page_range in the 2.6 kernel series. I
> use remap_page_range inside the mmap function of a module I wrote in
> order to map a given device's memory into user space.
>   Apparently, everything works fine but I just can't access the device's
> memory (even tough I get a valid point from the mmap system call). This
> is the mmap function I wrote:
> static int
> pcimap_mmap (struct file *filp, struct vm_area_struct *vma)
> {

(1) set PG_reserved on all struct pages covering the physical region
(2) set VM_RESERVED|VM_IO in vma->vm_flags


-- wli