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do_pages_stat() does not need any page_to_node entry for real. Just pass the pointers to the user-space page address array and to the user-space status array, and have do_pages_stat() traverse the former and fill the latter directly. Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr> Acked-by: Christoph Lameter <cl@linux-foundation.org> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>