1 files changed, 25 insertions, 66 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index ebfc238cc243..b5c21122c299 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -13,6 +13,7 @@
 #include <linux/numa.h>
 #include <linux/init.h>
 #include <linux/seqlock.h>
+#include <linux/nodemask.h>
 #include <asm/atomic.h>
 
 /* Free memory management - zoned buddy allocator.  */
@@ -225,7 +226,6 @@ struct zone {
          * Discontig memory support fields.
          */
         struct pglist_data      *zone_pgdat;
-        struct page             *zone_mem_map;
         /* zone_start_pfn == zone_start_paddr >> PAGE_SHIFT */
         unsigned long           zone_start_pfn;
 
@@ -307,7 +307,6 @@ typedef struct pglist_data {
         unsigned long node_spanned_pages; /* total size of physical page
                                              range, including holes */
         int node_id;
-        struct pglist_data *pgdat_next;
         wait_queue_head_t kswapd_wait;
         struct task_struct *kswapd;
         int kswapd_max_order;
@@ -324,8 +323,6 @@ typedef struct pglist_data {
 
 #include <linux/memory_hotplug.h>
 
-extern struct pglist_data *pgdat_list;
-
 void __get_zone_counts(unsigned long *active, unsigned long *inactive,
                         unsigned long *free, struct pglist_data *pgdat);
 void get_zone_counts(unsigned long *active, unsigned long *inactive,
@@ -350,57 +347,6 @@ unsigned long __init node_memmap_size_bytes(int, unsigned long, unsigned long);
  */
 #define zone_idx(zone)          ((zone) - (zone)->zone_pgdat->node_zones)
 
-/**
- * for_each_pgdat - helper macro to iterate over all nodes
- * @pgdat - pointer to a pg_data_t variable
- *
- * Meant to help with common loops of the form
- * pgdat = pgdat_list;
- * while(pgdat) {
- *      ...
- *      pgdat = pgdat->pgdat_next;
- * }
- */
-#define for_each_pgdat(pgdat) \
-        for (pgdat = pgdat_list; pgdat; pgdat = pgdat->pgdat_next)
-
-/*
- * next_zone - helper magic for for_each_zone()
- * Thanks to William Lee Irwin III for this piece of ingenuity.
- */
-static inline struct zone *next_zone(struct zone *zone)
-{
-        pg_data_t *pgdat = zone->zone_pgdat;
-
-        if (zone < pgdat->node_zones + MAX_NR_ZONES - 1)
-                zone++;
-        else if (pgdat->pgdat_next) {
-                pgdat = pgdat->pgdat_next;
-                zone = pgdat->node_zones;
-        } else
-                zone = NULL;
-
-        return zone;
-}
-
-/**
- * for_each_zone - helper macro to iterate over all memory zones
- * @zone - pointer to struct zone variable
- *
- * The user only needs to declare the zone variable, for_each_zone
- * fills it in. This basically means for_each_zone() is an
- * easier to read version of this piece of code:
- *
- * for (pgdat = pgdat_list; pgdat; pgdat = pgdat->node_next)
- *      for (i = 0; i < MAX_NR_ZONES; ++i) {
- *              struct zone * z = pgdat->node_zones + i;
- *              ...
- *      }
- * }
- */
-#define for_each_zone(zone) \
-        for (zone = pgdat_list->node_zones; zone; zone = next_zone(zone))
-
 static inline int populated_zone(struct zone *zone)
 {
         return (!!zone->present_pages);
@@ -472,6 +418,30 @@ extern struct pglist_data contig_page_data;
 
 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
 
+extern struct pglist_data *first_online_pgdat(void);
+extern struct pglist_data *next_online_pgdat(struct pglist_data *pgdat);
+extern struct zone *next_zone(struct zone *zone);
+
+/**
+ * for_each_pgdat - helper macro to iterate over all nodes
+ * @pgdat - pointer to a pg_data_t variable
+ */
+#define for_each_online_pgdat(pgdat)                    \
+        for (pgdat = first_online_pgdat();              \
+             pgdat;                                     \
+             pgdat = next_online_pgdat(pgdat))
+/**
+ * for_each_zone - helper macro to iterate over all memory zones
+ * @zone - pointer to struct zone variable
+ *
+ * The user only needs to declare the zone variable, for_each_zone
+ * fills it in.
+ */
+#define for_each_zone(zone)                             \
+        for (zone = (first_online_pgdat())->node_zones; \
+             zone;                                      \
+             zone = next_zone(zone))
+
 #ifdef CONFIG_SPARSEMEM
 #include <asm/sparsemem.h>
 #endif
@@ -602,17 +572,6 @@ static inline struct mem_section *__pfn_to_section(unsigned long pfn)
         return __nr_to_section(pfn_to_section_nr(pfn));
 }
 
-#define pfn_to_page(pfn)                                                \
-({                                                                      \
-        unsigned long __pfn = (pfn);                                    \
-        __section_mem_map_addr(__pfn_to_section(__pfn)) + __pfn;        \
-})
-#define page_to_pfn(page)                                               \
-({                                                                      \
-        page - __section_mem_map_addr(__nr_to_section(                  \
-                page_to_section(page)));                                \
-})
-
 static inline int pfn_valid(unsigned long pfn)
 {
         if (pfn_to_section_nr(pfn) >= NR_MEM_SECTIONS)