arch/sh/kernel/topology.c

   1 /*
   2  * arch/sh/kernel/topology.c
   3  *
   4  *  Copyright (C) 2007  Paul Mundt
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10 #include <linux/cpu.h>
  11 #include <linux/cpumask.h>
  12 #include <linux/init.h>
  13 #include <linux/percpu.h>
  14 #include <linux/node.h>
  15 #include <linux/nodemask.h>
  16
  17 static DEFINE_PER_CPU(struct cpu, cpu_devices);
  18
  19 static int __init topology_init(void)
  20 {
  21         int i, ret;
  22
  23 #ifdef CONFIG_NEED_MULTIPLE_NODES
  24         for_each_online_node(i)
  25                 register_one_node(i);
  26 #endif
  27
  28         for_each_present_cpu(i) {
  29                 ret = register_cpu(&per_cpu(cpu_devices, i), i);
  30                 if (unlikely(ret))
  31                         printk(KERN_WARNING "%s: register_cpu %d failed (%d)\n",
  32                                __func__, i, ret);
  33         }
  34
  35 #if defined(CONFIG_NUMA) && !defined(CONFIG_SMP)
  36         /*
  37          * In the UP case, make sure the CPU association is still
  38          * registered under each node. Without this, sysfs fails
  39          * to make the connection between nodes other than node0
  40          * and cpu0.
  41          */
  42         for_each_online_node(i)
  43                 if (i != numa_node_id())
  44                         register_cpu_under_node(raw_smp_processor_id(), i);
  45 #endif
  46
  47         return 0;
  48 }
  49 subsys_initcall(topology_init);