On Thu, Aug 8, 2013 at 2:00 AM, Hauke Mehrtens <hauke@xxxxxxxxxx> wrote:
> Please add backports mailing list ( backports@xxxxxxxxxxxxxxx ) next time.
Ok. Thanks.
>> diff --git a/backport/backport-include/asm/mtrr.h b/backport/backport-include/asm/mtrr.h
>> index cf0f6fd..c5760b4 100644
>> --- a/backport/backport-include/asm/mtrr.h
>> +++ b/backport/backport-include/asm/mtrr.h
>> @@ -7,14 +7,17 @@
>> * The following functions are for use by other drivers that cannot use
>> * arch_phys_wc_add and arch_phys_wc_del.
>> */
>> +#ifndef phys_wc_to_mtrr_index
>> #ifdef CONFIG_MTRR
>> -extern int phys_wc_to_mtrr_index(int handle);
>> +extern int backport_phys_wc_to_mtrr_index(int handle);
>> #else
>> -static inline int phys_wc_to_mtrr_index(int handle)
>> +static inline int backport_phys_wc_to_mtrr_index(int handle)
>> {
>> return -1;
>> }
>> #endif /* CONFIG_MTRR */
>> +#define phys_wc_to_mtrr_index LINUX_BACKPORT(phys_wc_to_mtrr_index)
>
> You should put this line before the #ifndef phy_.... and then you do not
> have to use backport_phys_wc_to_mtrr_index with the prefix anywhere in
> backports. This also applies for the other places where you manually add
> backport_.
The case I'm trying to un-break here is one where the symbol is
defined by the kernel, even though it's not supposed to. This can
happen if someone cherry-picks patches containing this symbol into
their kernel.
The backported driver is better off using the kernel symbol in that
case I guess?
Arik
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