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 <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 8dd0333b01dc254aad75654611dcb9e36f499e22..02069c23486de013baa2d1c8f32c305a24224d7d 100644 (file)
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -1063,7 +1063,7 @@ struct mem_section {
        unsigned long *pageblock_flags;
 #ifdef CONFIG_PAGE_EXTENSION
        /*
-        * If !SPARSEMEM, pgdat doesn't have page_ext pointer. We use
+        * If SPARSEMEM, pgdat doesn't have page_ext pointer. We use
         * section. (see page_ext.h about this.)
         */
        struct page_ext *page_ext;