mm: fix some typos in mm directory
No functional change. Link: http://lkml.kernel.org/r/20190118235123.27843-1-richard.weiyang@gmail.com Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Reviewed-by: Pekka Enberg <penberg@kernel.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@@ -1301,7 +1301,7 @@ void memory_present(int nid, unsigned long start, unsigned long end);
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/*
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* If it is possible to have holes within a MAX_ORDER_NR_PAGES, then we
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* need to check pfn validility within that MAX_ORDER_NR_PAGES block.
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* need to check pfn validity within that MAX_ORDER_NR_PAGES block.
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* pfn_valid_within() should be used in this case; we optimise this away
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* when we have no holes within a MAX_ORDER_NR_PAGES block.
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*/
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