[Xen-devel] Re: [patch 04/26] Xen-paravirt_ops: Add pagetable accessors to pack and unpack pagetable entries

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Ingo Molnar wrote:
> * Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:
>
>   
>> ===================================================================
>> --- a/arch/i386/kernel/vmlinux.lds.S
>> +++ b/arch/i386/kernel/vmlinux.lds.S
>> @@ -21,6 +21,9 @@
>>  #include <asm/page.h>
>>  #include <asm/cache.h>
>>  #include <asm/boot.h>
>> +
>> +#undef ENTRY
>> +#undef ALIGN
>>     
>
> hm, what's this? The reason is not documented.
>   
Good point; I'll add some comments.  The reason is that asm/linkage.h
ends up being included as a result of the other header file changes, and
it conflicts with the use of ENTRY and ALIGN here.  But its possible
that asm/linkage isn't needed anymore; that would be ideal if true.

>> +#ifdef CONFIG_PARAVIRT
>> +/* After pte_t, etc, have been defined */
>> +#include <asm/paravirt.h>
>> +#endif
>>     
>
> hm - there's already a CONFIG_PARAVIRT conditional in 
> asm-i386/paravirt.h.
>   

Yes, but it happens after asm/paravirt.h has already included some
things, and it ends up causing problems.  paravirt.h still defines
various stub functions in the !CONFIG_PARAVIRT case, so it needs to do
the includes either way.

    J

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