- Add two new functions to the AGP driver KPI to bind/unbind arbitrary sets
of pages into the GTT.
- Avoid possible overflow in agp_generic_alloc_memory.
- In agp(4) avoid the need to flush all cpu caches with wbinvd between
updating the GTT and flushing the AGP TLB by storing the GTT in
write-combining memory.
- In agp_amd_bind_page don't flush the AGP TLB. It's done by the calling
function.
- agp_generic_unbind_memory: flush AGP TLB before unwiring pages
agp_bind_pages: assert that pages have been wired down
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