Missing PAGE_MASK macro on PPC arches

[Josh Boyer]

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?

> Is it an upstream kernel bug or something else?

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.

josh