Re: Xen on ARM: upstream kernel compile fails with defconfig

[Julien Grall <julien.grall@linaro.org>]

(Add Ian Campbell for sunxi bits)

Hello Zoltan,

On 04/02/14 21:28, Zoltan Kiss wrote: 
> However both cases the build fails quite early with the same error:
> 
>    CC      arch/arm/kernel/asm-offsets.s
> In file included from /local/repo/linux-net-next/include/linux/cache.h:5:0,
>                   from /local/repo/linux-net-next/include/linux/printk.h:8,
>                   from 
> /local/repo/linux-net-next/include/linux/kernel.h:13,
>                   from /local/repo/linux-net-next/include/linux/sched.h:15,
>                   from 
> /local/repo/linux-net-next/arch/arm/kernel/asm-offsets.c:13:
> /local/repo/linux-net-next/include/linux/prefetch.h: In function 
> ‘prefetch_range’:
> /local/repo/linux-net-next/arch/arm/include/asm/cache.h:7:25: error: 
> ‘CONFIG_ARM_L1_CACHE_SHIFT’ undeclared (first use in this function)
>   #define L1_CACHE_SHIFT  CONFIG_ARM_L1_CACHE_SHIFT

I can't get the same error with net-next + your V7. I have this following error:

drivers/xen/grant-table.c: In function ‘__gnttab_unmap_refs’:
drivers/xen/grant-table.c:1047:3: error: implicit declaration of function ‘get_phys_to_machine’ [-Werror=implicit-function-declaration]
   mfn = get_phys_to_machine(page_to_pfn(pages[i]));
   ^

I'm using this config for Linux: http://xenbits.xen.org/people/julieng/config-midway
 
> So far I figured out that autoconf.h is not included here, that CONFIG_ 
> is defined there. But I'm not that familiar with the kernel build 
> system, so I'm a bit stucked here. Probably I'm doing something 
> trivially wrong, can someone help me?
> Btw. on Julian's repo from the Arndale page I could compile, but that's 
> too old for my patch to apply. My main goal is to compile an upstream 
> kernel with Xen, and then check if my patch breaks it.

The kernel repo for the Arndale is completely out-of-date on the wiki page.
I will update the wiki page to use directly the Linaro tree.

Sincerely yours,


-- 
Julien Grall