Missing PAGE_MASK macro on PPC arches

[Dmitry Butskoy]

Josh Boyer wrote:
> On Mon, 2007-06-25 at 16:24 +0400, Dmitry Butskoy wrote:
>   
>> The macro "PAGE_MASK" is normally defined in the "asm/page.h" header, 
>> provided  by the "kernel-headers" package. This header is auto-generated 
>> from the correspond "include/asm-powerpc/page.h", with removing of all 
>> "__KERNEL__" ifdefs.
>>
>> Unlike in x86, the "PAGE_MASK" definition in 
>> "include/asm-powerpc/page.h" is kernel-private (i.e. sits under the 
>> "__KERNEL__" ifdef), hence after the stripping we have an empty 
>> "asm/page.h" for ppc and ppc64 arches.
>>
>> Because of this some programs are not compiled properly.
>>     
>
> Which programs?  Why do they care about the page size?
>   

fbtv (Frame Buffer TV) from xawtv package.
> It's likely not a bug.  PowerPC can have 4KiB or 64KiB pages, and
> PAGE_MASK is dependent upon the kernel config option being set one way
> or another since it's derived from PAGE_SHIFT.
>   

Yep, we just should use getpagesize() for now.


Axel Thimm wrote:
> It also happens on RHEL5/x86_64:
>
>   

It seems such programs should be patched to calculate masks from the 
getpagesize() returned value.


~buc