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
Date: Wed, 17 Nov 2004 18:02:15 -0800 [thread overview]
Message-ID: <20041118020215.GA3217@holomorphy.com> (raw)
In-Reply-To: <32825.150.162.62.34.1100724226.squirrel@150.162.62.34>
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
prev parent reply other threads:[~2004-11-18 2:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-11-17 20:43 remap_page_range Thiago Robert dos Santos
2004-11-18 2:02 ` William Lee Irwin III [this message]
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