question on memory map of process on i386

On i386, /proc/<pid>/maps shows the following entry:

ffffe000-fffff000 ---p 00000000 00:00 0

This page of memory is way up above TASK_SIZE (which is 0xc0000000), so how is it visible to userspace?

Just to complicate things, I seem to find the vma for this page using find_vma_prev().

Can anyone explain what's going on?



Thanks,

Chris
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