Hi David,
On 04/24/2014 01:22 PM, David Vrabel wrote:
> On 18/04/14 16:54, Julien Grall wrote:
>> virt_to_pfn has been defined in asm/memory.h by the commit e26a9e0 "ARM:
>> Better
>> virt_to_page() handling"
>>
>> This will result of a compilation warning when CONFIG_XEN is enabled.
>>
>> arch/arm/include/asm/xen/page.h:80:0: warning: "virt_to_pfn" redefined
>> [enabled by default]
>> #define virt_to_pfn(v) (PFN_DOWN(__pa(v)))
>> ^
>> In file included from arch/arm/include/asm/page.h:163:0,
>> from arch/arm/include/asm/xen/page.h:4,
>> from include/xen/page.h:4,
>> from arch/arm/xen/grant-table.c:33:
>>
>> The definition in memory.h is nearly the same (it directly expand PFN_DOWN),
>> so we can safely drop virt_to_pfn in xen include.
>
>
> This breaks the arm build for me.
>
> /local/davidvr/work/k.org/tip/drivers/block/xen-blkfront.c: In function
> ‘setup_blkring’:
> /local/davidvr/work/k.org/tip/drivers/block/xen-blkfront.c:1236:2:
> error: implicit declaration of function ‘virt_to_pfn’
> [-Werror=implicit-function-declaration]
> err = xenbus_grant_ring(dev, virt_to_mfn(info->ring.sring));
> ^
I don't have any issue to build the following branch with this patch on:
- v3.15-rc2
- xentip master
- xentip for-linus-3.16
Regards,
--
Julien Grall
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