ia64/linux-2.6.18-xen.hg

view mm/mmzone.c @ 0:831230e53067

Import 2.6.18 from kernel.org tarball.
author Ian Campbell <ian.campbell@xensource.com>
date Wed Apr 11 14:15:44 2007 +0100 (2007-04-11)
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1 /*
2 * linux/mm/mmzone.c
3 *
4 * management codes for pgdats and zones.
5 */
8 #include <linux/stddef.h>
9 #include <linux/mmzone.h>
10 #include <linux/module.h>
12 struct pglist_data *first_online_pgdat(void)
13 {
14 return NODE_DATA(first_online_node);
15 }
17 EXPORT_UNUSED_SYMBOL(first_online_pgdat); /* June 2006 */
19 struct pglist_data *next_online_pgdat(struct pglist_data *pgdat)
20 {
21 int nid = next_online_node(pgdat->node_id);
23 if (nid == MAX_NUMNODES)
24 return NULL;
25 return NODE_DATA(nid);
26 }
27 EXPORT_UNUSED_SYMBOL(next_online_pgdat); /* June 2006 */
30 /*
31 * next_zone - helper magic for for_each_zone()
32 */
33 struct zone *next_zone(struct zone *zone)
34 {
35 pg_data_t *pgdat = zone->zone_pgdat;
37 if (zone < pgdat->node_zones + MAX_NR_ZONES - 1)
38 zone++;
39 else {
40 pgdat = next_online_pgdat(pgdat);
41 if (pgdat)
42 zone = pgdat->node_zones;
43 else
44 zone = NULL;
45 }
46 return zone;
47 }
48 EXPORT_UNUSED_SYMBOL(next_zone); /* June 2006 */