> Grumble. The options are:
>
> a) export it in the kernel's native size and have userspace figure it
> out
> b) add a header
> c) lie to 32-bit apps on 64-bit kernels
> d) always export 32 bits
> e) always export 64 bits
>
> I started with (a), switched to (b), and then Alan and Dave convinced
> me to switch back to (a). I don't think (c) is desireable, especially
> as it means having two code paths. (d) would work until memory got
> large enough that PFNs didn't fit in 32 bits. (e) would be ok all
> around, except for the extra overhead. Ho hum.
If the overhead of (e) is ok for 64bit it should be ok for 32bit too.
-Andi
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