get_user_pages() to TTM pages is uwanted since TTM assumes it owns the pages exclusively and / or sets up page-table mappings to io memory.
The first patch make sures we stop fast gup to huge TTM pages using a trick with pmd_devmap() and pud_devmap() without a backing dev_pagemap. The second patch makes sure we block normal gup by setting VM_PFNMAP Cc: Christian Koenig <[email protected]> Cc: David Airlie <[email protected]> Cc: Daniel Vetter <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Jason Gunthorpe <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Signed-off-by: Thomas Hellström (Intel) <[email protected]>
