mm fix commmets: if SPARSEMEM, pgdata doesn't have page_ext
If SPARSEMEM, use page_ext in mem_section if !SPARSEMEM, use page_ext in pgdata Signed-off-by: Weijie Yang <weijie.yang@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -1063,7 +1063,7 @@ struct mem_section {
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unsigned long *pageblock_flags;
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#ifdef CONFIG_PAGE_EXTENSION
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/*
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* If !SPARSEMEM, pgdat doesn't have page_ext pointer. We use
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* If SPARSEMEM, pgdat doesn't have page_ext pointer. We use
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* section. (see page_ext.h about this.)
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*/
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struct page_ext *page_ext;
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