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Re: mmap problems ? in 2.4.5

To: Pete Popov <>
Subject: Re: mmap problems ? in 2.4.5
From: Geert Uytterhoeven <>
Date: Tue, 26 Jun 2001 21:18:10 +0200 (MET DST)
Cc: Scott A McConnell <>,
In-reply-to: <>
On Tue, 26 Jun 2001, Pete Popov wrote:
> Scott A McConnell wrote:
> >I have a simple program that maps a frame buffer into user space and
> >draws an image
> >onto the fb.
> >
> >This program worked fine under 2.4.3 however under 2.4.5 the program
> >runs but nothing appears on the FB. The memory I am writing to does not
> >appear to be the frame buffer.
> >
> >Nothing has changed in my fb driver so I am wondering if anything has
> >changed in how memory is mapped via the kernel?
> >
> I believe the frame buffer driver interface changed in 2.4.5. It 
> supposed to be much cleaner now and the fb driver has to do less than 
> before.  You'll probably need to port your driver to 2.4.5.  If you have 
> any problems, I think the fb maintainers can help you out.

No, those fundamental changes are scheduled for 2.5.x.



Geert Uytterhoeven ------------- Sony Software Development Center Europe (SDCE) ------------------- Sint-Stevens-Woluwestraat 55
Voice +32-2-7248626 Fax +32-2-7262686 ---------------- B-1130 Brussels, Belgium

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