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The implementation of the lruvec stat functions and their variants for accounting through a page, or accounting from a preemptible context, are mostly identical and needlessly repetitive. Implement the lruvec_page functions by looking up the page's lruvec and then using the lruvec function. Implement the functions for preemptible contexts by disabling preemption before calling the atomic context functions. Link: http://lkml.kernel.org/r/20171103153336.24044-2-hannes@cmpxchg.org Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com> Cc: Michal Hocko <mhocko@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>