[PATCH] for_each_online_pgdat: remove pgdat_list

By using for_each_online_pgdat(), pgdat_list is not necessary now.  This patch
removes it.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 96eb08025092a7c62378ea0e34934cc61ed01027..0d12c3cf1f869539c88b118677a3f3e403f27ec3 100644 (file)
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -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,

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ccc3713dd4074b8eaa70544b7a130586c87c8bfa..dc523a1f270db11ad4930fa47548232c14e6e4ad 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -49,7 +49,6 @@ nodemask_t node_online_map __read_mostly = { { [0] = 1UL } };
 EXPORT_SYMBOL(node_online_map);
 nodemask_t node_possible_map __read_mostly = NODE_MASK_ALL;
 EXPORT_SYMBOL(node_possible_map);
-struct pglist_data *pgdat_list __read_mostly;
 unsigned long totalram_pages __read_mostly;
 unsigned long totalhigh_pages __read_mostly;
 long nr_swap_pages;
@@ -2169,8 +2168,9 @@ static void *frag_start(struct seq_file *m, loff_t *pos)
 {
        pg_data_t *pgdat;
        loff_t node = *pos;
-
-       for (pgdat = pgdat_list; pgdat && node; pgdat = pgdat->pgdat_next)
+       for (pgdat = first_online_pgdat();
+            pgdat && node;
+            pgdat = next_online_pgdat(pgdat))
                --node;
 
        return pgdat;
@@ -2181,7 +2181,7 @@ static void *frag_next(struct seq_file *m, void *arg, loff_t *pos)
        pg_data_t *pgdat = (pg_data_t *)arg;
 
        (*pos)++;
-       return pgdat->pgdat_next;
+       return next_online_pgdat(pgdat);
 }
 
 static void frag_stop(struct seq_file *m, void *arg)