include/linux/topology.h

   1 /*
   2  * include/linux/topology.h
   3  *
   4  * Written by: Matthew Dobson, IBM Corporation
   5  *
   6  * Copyright (C) 2002, IBM Corp.
   7  *
   8  * All rights reserved.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful, but
  16  * WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  18  * NON INFRINGEMENT.  See the GNU General Public License for more
  19  * details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  *
  25  * Send feedback to <colpatch@us.ibm.com>
  26  */
  27 #ifndef _LINUX_TOPOLOGY_H
  28 #define _LINUX_TOPOLOGY_H
  29
  30 #include <linux/cpumask.h>
  31 #include <linux/bitops.h>
  32 #include <linux/mmzone.h>
  33 #include <linux/smp.h>
  34
  35 #include <asm/topology.h>
  36
  37 #ifndef nr_cpus_node
  38 #define nr_cpus_node(node)                                                      \
  39         ({                                                                      \
  40                 cpumask_t __tmp__;                                              \
  41                 __tmp__ = node_to_cpumask(node);                                \
  42                 cpus_weight(__tmp__);                                           \
  43         })
  44 #endif
  45
  46 static inline int __next_node_with_cpus(int node)
  47 {
  48         do
  49                 ++node;
  50         while (node < numnodes && !nr_cpus_node(node));
  51         return node;
  52 }
  53
  54 #define for_each_node_with_cpus(node) \
  55         for (node = 0; node < numnodes; node = __next_node_with_cpus(node))
  56
  57 #ifndef node_distance
  58 #define node_distance(from,to)  ((from) != (to))
  59 #endif
  60 #ifndef PENALTY_FOR_NODE_WITH_CPUS
  61 #define PENALTY_FOR_NODE_WITH_CPUS      (1)
  62 #endif
  63
  64 #endif /* _LINUX_TOPOLOGY_H */