sdhci-pltfm: implement platform data passing

[safe/jmp/linux-2.6] / mm / page_alloc.c

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 595d0ac..08b3499 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2571,8 +2571,11 @@ int numa_zonelist_order_handler(ctl_table *table, int write,
                        strncpy((char*)table->data, saved_string,
                                NUMA_ZONELIST_ORDER_LEN);
                        user_zonelist_order = oldval;
-               } else if (oldval != user_zonelist_order)
-                       build_all_zonelists();
+               } else if (oldval != user_zonelist_order) {
+                       mutex_lock(&zonelists_mutex);
+                       build_all_zonelists(NULL);
+                       mutex_unlock(&zonelists_mutex);
+               }
        }
 out:
        mutex_unlock(&zl_order_mutex);
@@ -2922,9 +2925,16 @@ static void build_zonelist_cache(pg_data_t *pgdat)
  */
 static void setup_pageset(struct per_cpu_pageset *p, unsigned long batch);
 static DEFINE_PER_CPU(struct per_cpu_pageset, boot_pageset);
+static void setup_zone_pageset(struct zone *zone);
+
+/*
+ * Global mutex to protect against size modification of zonelists
+ * as well as to serialize pageset setup for the new populated zone.
+ */
+DEFINE_MUTEX(zonelists_mutex);
 
 /* return values int ....just for stop_machine() */
-static int __build_all_zonelists(void *dummy)
+static __init_refok int __build_all_zonelists(void *data)
 {
        int nid;
        int cpu;
@@ -2939,6 +2949,14 @@ static int __build_all_zonelists(void *dummy)
                build_zonelist_cache(pgdat);
        }
 
+#ifdef CONFIG_MEMORY_HOTPLUG
+       /* Setup real pagesets for the new zone */
+       if (data) {
+               struct zone *zone = data;
+               setup_zone_pageset(zone);
+       }
+#endif
+
        /*
         * Initialize the boot_pagesets that are going to be used
         * for bootstrapping processors. The real pagesets for
@@ -2958,7 +2976,11 @@ static int __build_all_zonelists(void *dummy)
        return 0;
 }
 
-void build_all_zonelists(void)
+/*
+ * Called with zonelists_mutex held always
+ * unless system_state == SYSTEM_BOOTING.
+ */
+void build_all_zonelists(void *data)
 {
        set_zonelist_order();
 
@@ -2969,7 +2991,7 @@ void build_all_zonelists(void)
        } else {
                /* we have to stop all cpus to guarantee there is no user
                   of zonelist */
-               stop_machine(__build_all_zonelists, NULL, NULL);
+               stop_machine(__build_all_zonelists, data, NULL);
                /* cpuset refresh routine should be here */
        }
        vm_total_pages = nr_free_pagecache_pages();