shared memory problem on ARM v5TE using threads

[hs@denx.de (Heiko Schocher)]

Hello Russell,

Russell King - ARM Linux wrote:
> On Sun, Dec 06, 2009 at 03:53:48PM +0200, Ronen Shitrit wrote:
>> There isn't any known issues related to working with C=0 B=1 on Kirkwood.
>> Can you pls run this test on some other ARMv5 platform and approve it is
>> working.
> 
> I ran it on an ARM926EJ-S, which is ARMv5 and worked fine.
> 
> If there's no problem with C=0 B=1 mappings on Kirkwood, I've no idea
> what's going on, and I don't have any suggestion on what to try next.

Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org> suggested
me, to try the following patch, he wrote:
> But to check whether C=0 B=1 is
> indeed the issue, you may try the following patch:
> 
> diff --git a/arch/arm/mm/fault-armv.c b/arch/arm/mm/fault-armv.c
> index d0d17b6..d65816e 100644
> --- a/arch/arm/mm/fault-armv.c
> +++ b/arch/arm/mm/fault-armv.c
> @@ -23,7 +23,7 @@
>  #include <asm/pgtable.h>
>  #include <asm/tlbflush.h>
> 
> -static unsigned long shared_pte_mask = L_PTE_MT_BUFFERABLE;
> +static unsigned long shared_pte_mask = L_PTE_MT_UNCACHED;
> 
>  /*
>   * We take the easy way out of this problem - we make the
> 
> 

I tried it with this patch, and the testprogram also don;t work ...

bye
Heiko
-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany