1 files changed, 12 insertions, 2 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index cf9e458e96b0..0fa491326c4a 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -321,6 +321,15 @@ struct zone {
         unsigned long           *pageblock_flags;
 #endif /* CONFIG_SPARSEMEM */
 
+#ifdef CONFIG_COMPACTION
+        /*
+         * On compaction failure, 1<<compact_defer_shift compactions
+         * are skipped before trying again. The number attempted since
+         * last failure is tracked with compact_considered.
+         */
+        unsigned int            compact_considered;
+        unsigned int            compact_defer_shift;
+#endif
 
         ZONE_PADDING(_pad1_)
 
@@ -641,9 +650,10 @@ typedef struct pglist_data {
 
 #include <linux/memory_hotplug.h>
 
+extern struct mutex zonelists_mutex;
 void get_zone_counts(unsigned long *active, unsigned long *inactive,
                         unsigned long *free);
-void build_all_zonelists(void);
+void build_all_zonelists(void *data);
 void wakeup_kswapd(struct zone *zone, int order);
 int zone_watermark_ok(struct zone *z, int order, unsigned long mark,
                 int classzone_idx, int alloc_flags);
@@ -972,7 +982,7 @@ struct mem_section {
 #endif
 
 #define SECTION_NR_TO_ROOT(sec) ((sec) / SECTIONS_PER_ROOT)
-#define NR_SECTION_ROOTS        (NR_MEM_SECTIONS / SECTIONS_PER_ROOT)
+#define NR_SECTION_ROOTS        DIV_ROUND_UP(NR_MEM_SECTIONS, SECTIONS_PER_ROOT)
 #define SECTION_ROOT_MASK       (SECTIONS_PER_ROOT - 1)
 
 #ifdef CONFIG_SPARSEMEM_EXTREME