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Message-ID: <7d40d7190603051040h17da06caw@mail.gmail.com>
Date: Sun, 5 Mar 2006 19:40:18 +0100
From: "Aritz Bastida" <aritzbastida@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: Re: MMAP: How a driver can get called on mprotect()
Cc: "Jan-Benedict Glaw" <jbglaw@lug-owl.de>
In-Reply-To: <20060305182240.GH19232@lug-owl.de>
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References: <7d40d7190603051012p16ed826cx@mail.gmail.com>
	 <20060305182240.GH19232@lug-owl.de>
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> Well, what hardware is it for and where can we download the driver to
> have a view at it? That'd probably help suggesting something...
>

Well actually is a virtual memory driver somewhat based on scullp
device in the book Linux Device Drivers 3rd edition.

Nonetheless the question is the same: a char device with mmap
implemented can get called any time a new vma is created or destroyed
(a process creating a new mmap):  vma_open() and vma_close().

But if a user process changes the mmap protections calling mprotect()?
How can the driver know about that? Is there any way to do that?

Thanks
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