Re: [Xenomai-help] Some problems with shared memory

[Philippe Gerum <rpm@xenomai.org>]

On Wed, 2009-06-17 at 13:40 +0200, roderik.wildenburg@domain.hid
wrote:
> Hello, 
> 
> > On Tue, 2009-06-16 at 15:20 +0200, roderik.wildenburg@domain.hid
> > wrote:
> > > Hi,
> > > 
> > > I applied your ipipe-patch to our 2.4.25 ppc kernel, but 
> > unfortunatelly I now can´t compile the kernel any more.
> > > I get following error messages :
> > > 
> > > ipipe.c:393: error: `__switch_to' undeclared here (not in a 
> > function)
> > > ipipe.c:393: error: initializer element is not constant
> > > ipipe.c:393: error: (near initialization for 
> > `__ksymtab___switch_to.value')
> > > ipipe.c:394: error: `show_stack' undeclared here (not in a function)
> > > ipipe.c:394: error: initializer element is not constant
> > > ipipe.c:394: error: (near initialization for 
> > `__ksymtab_show_stack.value')
> > > ipipe.c:393: error: __ksymtab___switch_to causes a section 
> > type conflict
> > > ipipe.c:394: error: __ksymtab_show_stack causes a section 
> > type conflict
> > > make[1]: *** [ipipe.o] Fehler 1
> > > 
> > > 
> > > 
> > > Our hardware is based on a freescale 5200B, so, as far as I 
> > understand your question about PICs, your patch should work 
> > for our hardware (I hope).
> > 
> > This patch is based on the current HEAD of
> > git://www.denx.de/git/linuxppc_2_4_devel.git
> > (commit 5bab6d641ff5ba139f9f41869502cb7c96d785bc)
> > 
> > The patched kernel builds and runs fine using lite5200b_defconfig.
> > 
> 
> Our kernel isn´t HEAD but is close to (2 or 3 commits before HEAD).
> Nevetheless I checked out HEAD and used the lite5200b_defconfig.
> Indeed the kernel compiles fine with this configuration. 
> After comparing the lite5200b configuration with our one (uc101) and playing around quite a while with the options I figured out that "CONFIG_MODULES=y" does the trick. Activating this option leads to the errors I described in my ealier mails. Please find attached the .config I used to produce the compile errors.
> Do you have an idea what I have to change in the 2.0-Ipipe-patch to make it work with CONFIG_MODULES enabled.
> 

The EXPORT directives were wrong, actually copied&pasted as is from 2.6.
Try this patch instead:

http://download.gna.org/adeos/patches/v2.4/ppc/adeos-ipipe-2.4.25-ppc-DENX-2.0-01.patch


> Thank you for your help and best regards 
> Roderik
> 
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-- 
Philippe.