diff options
author | Jeff Garzik <jeff@garzik.org> | 2006-03-29 17:18:49 -0500 |
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committer | Jeff Garzik <jeff@garzik.org> | 2006-03-29 17:18:49 -0500 |
commit | e02a4cabfcb9a999b74a2e2e6f13ffcb7ff2d606 (patch) | |
tree | 2f3db60be4c57eca2a4c3ab3f3122dcf1ec0c624 /mm/mmzone.c | |
parent | 600511e86babe3727264a0883a3a264f6fb6caf5 (diff) | |
parent | f3cab8a0b1a772dc8b055b7affa567a366627c9e (diff) |
Merge branch 'master'
Diffstat (limited to 'mm/mmzone.c')
-rw-r--r-- | mm/mmzone.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/mm/mmzone.c b/mm/mmzone.c new file mode 100644 index 00000000000..b022370e612 --- /dev/null +++ b/mm/mmzone.c @@ -0,0 +1,50 @@ +/* + * linux/mm/mmzone.c + * + * management codes for pgdats and zones. + */ + + +#include <linux/config.h> +#include <linux/stddef.h> +#include <linux/mmzone.h> +#include <linux/module.h> + +struct pglist_data *first_online_pgdat(void) +{ + return NODE_DATA(first_online_node); +} + +EXPORT_SYMBOL(first_online_pgdat); + +struct pglist_data *next_online_pgdat(struct pglist_data *pgdat) +{ + int nid = next_online_node(pgdat->node_id); + + if (nid == MAX_NUMNODES) + return NULL; + return NODE_DATA(nid); +} +EXPORT_SYMBOL(next_online_pgdat); + + +/* + * next_zone - helper magic for for_each_zone() + */ +struct zone *next_zone(struct zone *zone) +{ + pg_data_t *pgdat = zone->zone_pgdat; + + if (zone < pgdat->node_zones + MAX_NR_ZONES - 1) + zone++; + else { + pgdat = next_online_pgdat(pgdat); + if (pgdat) + zone = pgdat->node_zones; + else + zone = NULL; + } + return zone; +} +EXPORT_SYMBOL(next_zone); + |