On Thu, Mar 21, 2002 at 09:20:31AM +0100, TAJTHY Tam?s wrote:
> I would like to use the request_region function in the kernel. I if use in
> a module there is no problem, but if I put it into the kernel, it hangs
> during the boot. Can anyone help me how to use it? It is a 2.4.7 kernel
> for a PPC platform.
>
> I added the following lines to the arch/ppc/kernel/m8xx_setup.c in the
> m8xx_get_rtc_time function :
>
> if(!rtc_vm_base)
> if (request_region(IO_ADR_RTC, IO_LEN_RTC, "k14_rtc"))
> rtc_vm_base = ioremap(IO_ADR_RTC, IO_LEN_RTC);
> else
> printk("Can't request IO ports\n");
>
> If I don't use request_region it works nicely, but I'd like to
> allocate this IO region not to allow other modules to modify the chip
> settings. How can I do that?
I'm not a PPC expert, but because you're doing this in setup code, it
is very well posible that the memory management isn't initialised yet.
Erik
--
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Faculty
of Information Technology and Systems, Delft University of Technology,
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Fax: +31-15-2781843 Email: J.A.K.Mouw@its.tudelft.nl
WWW: http://www-ict.its.tudelft.nl/~erik/
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