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List:       linux-arm-kernel
Subject:    Re: ioremap question
From:       "Kentropy" <kentropy () libero ! it>
Date:       2002-07-26 16:27:27
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After other digging, I've another question for the experts:
Why Jornada720.c (that uses a similar Epson fb) need
iotable_init(jornada720_io_desc) mapping the framebuffer area ?
I tried to do the same but the kernel continue to corrupt my fb.
----------------------------------
M.C.K.
kentropy-AT-libero-DOT-it



> On Fri, Jul 26, 2002 at 05:49:48PM +0200, Kentropy wrote:
> > The question is: is this request_mem_region( ) call necessary ?
>
> It provides resource handling (in see /proc/iomem).  It doesn't
> actually prevent the kernel from scribbling where it wants to.
> (eg, if you request_mem_region all the system RAM, the kernel
> will still run happily).  Its only function is to prevent two
> drivers tredding on each other toes.
>


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