1 files changed, 9 insertions, 4 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ca973359fe5f..24659ed06bae 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -395,11 +395,11 @@ static inline void set_compound_order(struct page *page, unsigned long order)
  * we have run out of space and have to fall back to an
  * alternate (slower) way of determining the node.
  *
- *        No sparsemem: |       NODE     | ZONE | ... | FLAGS |
- * with space for node: | SECTION | NODE | ZONE | ... | FLAGS |
- *   no space for node: | SECTION |     ZONE    | ... | FLAGS |
+ * No sparsemem or sparsemem vmemmap: |       NODE     | ZONE | ... | FLAGS |
+ * classic sparse with space for node:| SECTION | NODE | ZONE | ... | FLAGS |
+ * classic sparse no space for node:  | SECTION |     ZONE    | ... | FLAGS |
  */
-#ifdef CONFIG_SPARSEMEM
+#if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP)
 #define SECTIONS_WIDTH          SECTIONS_SHIFT
 #else
 #define SECTIONS_WIDTH          0
@@ -410,6 +410,9 @@ static inline void set_compound_order(struct page *page, unsigned long order)
 #if SECTIONS_WIDTH+ZONES_WIDTH+NODES_SHIFT <= FLAGS_RESERVED
 #define NODES_WIDTH             NODES_SHIFT
 #else
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+#error "Vmemmap: No space for nodes field in page flags"
+#endif
 #define NODES_WIDTH             0
 #endif
 
@@ -502,10 +505,12 @@ static inline struct zone *page_zone(struct page *page)
         return &NODE_DATA(page_to_nid(page))->node_zones[page_zonenum(page)];
 }
 
+#if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP)
 static inline unsigned long page_to_section(struct page *page)
 {
         return (page->flags >> SECTIONS_PGSHIFT) & SECTIONS_MASK;
 }
+#endif
 
 static inline void set_page_zone(struct page *page, enum zone_type zone)
 {