Commit | Line | Data |
---|---|---|
95144c78 KH |
1 | /* |
2 | * linux/mm/mmzone.c | |
3 | * | |
4 | * management codes for pgdats and zones. | |
5 | */ | |
6 | ||
7 | ||
8 | #include <linux/config.h> | |
9 | #include <linux/stddef.h> | |
10 | #include <linux/mmzone.h> | |
11 | #include <linux/module.h> | |
12 | ||
13 | struct pglist_data *first_online_pgdat(void) | |
14 | { | |
15 | return NODE_DATA(first_online_node); | |
16 | } | |
17 | ||
18 | EXPORT_SYMBOL(first_online_pgdat); | |
19 | ||
20 | struct pglist_data *next_online_pgdat(struct pglist_data *pgdat) | |
21 | { | |
22 | int nid = next_online_node(pgdat->node_id); | |
23 | ||
24 | if (nid == MAX_NUMNODES) | |
25 | return NULL; | |
26 | return NODE_DATA(nid); | |
27 | } | |
28 | EXPORT_SYMBOL(next_online_pgdat); | |
29 | ||
30 | ||
31 | /* | |
32 | * next_zone - helper magic for for_each_zone() | |
33 | */ | |
34 | struct zone *next_zone(struct zone *zone) | |
35 | { | |
36 | pg_data_t *pgdat = zone->zone_pgdat; | |
37 | ||
38 | if (zone < pgdat->node_zones + MAX_NR_ZONES - 1) | |
39 | zone++; | |
40 | else { | |
41 | pgdat = next_online_pgdat(pgdat); | |
42 | if (pgdat) | |
43 | zone = pgdat->node_zones; | |
44 | else | |
45 | zone = NULL; | |
46 | } | |
47 | return zone; | |
48 | } | |
49 | EXPORT_SYMBOL(next_zone); | |
50 |