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Re: [ts-7000] [2.6.28.3-m] Fix sparsemem bug

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Subject: Re: [ts-7000] [2.6.28.3-m] Fix sparsemem bug
From: "Breton M. Saunders" <>
Date: Tue, 10 Feb 2009 22:05:48 +0000
Good work guys!

Please to see it fixed in < 1 day!

When I did the discontig patch I had > 1000 lines of printascii in the 
kernel.  I had painful flashbacks reading these exchanges today.

I'll try it out later on provided I get time this evening.

    -Brett

Christian Gagneraud wrote:
> Hi all,
>
> Here is a fix to be able to boot a ts7260 with 64MB of SDRAM using the 
> kernel 2.6.28.3-m.
> If people could test it, as i'm not sure this is the definitive answer 
> to the problem.
>
> In short, it was as simple as a clash between C macros and inline 
> function!  (+ potentially the 0xC0000000 thingie pointed to by Charlie).
>
> If you have a look at arch/arm/include/asm/memory.h, you will see this:
> #ifndef __virt_to_phys
> #define __virt_to_phys(x)     ((x) - PAGE_OFFSET + PHYS_OFFSET)
> #define __phys_to_virt(x)     ((x) - PHYS_OFFSET + PAGE_OFFSET)
> #endif
>
> I realized that once __phys_to_virt() modified to try Charlie's 
> remark, i still get 0xe0000000 translated to 0xa0000000, which was 
> impossible unless i was not using my modified version.
>
> I did not run extensive tests, but at least my kernel boot and shows:
> Memory: 8MB 8MB 8MB 8MB 8MB 8MB 8MB 8MB = 64MB total
>
>
> Regards,
> Christian
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>   



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