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Implement the pte_special bit for x86. This is required to support lockless get_user_pages, because we need to know whether or not we can refcount a particular page given only its pte (and no vma). [[email protected]: fix a BUG] Signed-off-by: Nick Piggin <[email protected]> Cc: Dave Kleikamp <[email protected]> Cc: Andy Whitcroft <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Dave Kleikamp <[email protected]> Cc: Badari Pulavarty <[email protected]> Cc: Zach Brown <[email protected]> Cc: Jens Axboe <[email protected]> Reviewed-by: Peter Zijlstra <[email protected]> Signed-off-by: Hugh Dickins <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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