[NUMA x86_64] problem accessing global Node List pgdat_list

[devesh sharma <devesh28@gmail.com>]

Hi all,
On an dual opteron machine and 2.6.9 kernel, I am accessing the global
node list pgdat_list but I am not getting the desired results

#include<linux/module.h>
#include<linux/config.h>
#include<linux/kernel.h>
#include<linux/mmzone.h>

struct pglist_data *pgdat_list ;

int init_module( void )
{

  pg_data_t *pg_dat ;

  printk ("<1>****Module initialized to retrive the information of
pgdat_list list in the Kernel****\n" ) ;


  for_each_pgdat(pg_dat)
  {
    printk ("<1>The number of zones on this node are %x\n", pg_dat ->
nr_zones ) ;

    printk ("<1>The Node Id of this node is %d\n", pg_dat -> node_id ) ;

  }

  return 0 ;
}

void cleanup_module ( void )
{
    printk ("<1>********Module Exiting***********\n" ) ;
}

MODULE_LICENSE("GPL") ;

How I can access this list any body tell me the solution.
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