diff options
| author | Andrew Morton <akpm@digeo.com> | 2002-10-31 20:02:31 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@home.transmeta.com> | 2002-10-31 20:02:31 -0800 |
| commit | 7c265fe6370fc05acb39ee919bdfacd42f96c7fb (patch) | |
| tree | a305e6913d6a68a9cc228ba20f9d4c77d33dec76 /include | |
| parent | 6e8b708eb14ca90a08bf679ff4503ce3ec8effc1 (diff) | |
[PATCH] create node_online_map
From Matthew Dobson.
Create and use node_online_map.
This patch creates a node_online_map, much like cpu_online_map. It
also creates the standard helper functions, ie: node_online(),
num_online_nodes(), node_set_online(), node_set_offline().
This is used by driverFS topology to keep track of which Nodes
are in the system and online.
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mmzone.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index be4f03235e3d..3e004bc2ff63 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -280,10 +280,25 @@ extern struct pglist_data contig_page_data; #endif /* !CONFIG_DISCONTIGMEM */ +extern DECLARE_BITMAP(node_online_map, MAX_NUMNODES); extern DECLARE_BITMAP(memblk_online_map, MAX_NR_MEMBLKS); #if defined(CONFIG_DISCONTIGMEM) || defined(CONFIG_NUMA) +#define node_online(node) test_bit(node, node_online_map) +#define node_set_online(node) set_bit(node, node_online_map) +#define node_set_offline(node) clear_bit(node, node_online_map) +static inline unsigned int num_online_nodes(void) +{ + int i, num = 0; + + for(i = 0; i < MAX_NUMNODES; i++){ + if (node_online(i)) + num++; + } + return num; +} + #define memblk_online(memblk) test_bit(memblk, memblk_online_map) #define memblk_set_online(memblk) set_bit(memblk, memblk_online_map) #define memblk_set_offline(memblk) clear_bit(memblk, memblk_online_map) @@ -300,6 +315,14 @@ static inline unsigned int num_online_memblks(void) #else /* !CONFIG_DISCONTIGMEM && !CONFIG_NUMA */ +#define node_online(node) \ + ({ BUG_ON((node) != 0); test_bit(node, node_online_map); }) +#define node_set_online(node) \ + ({ BUG_ON((node) != 0); set_bit(node, node_online_map); }) +#define node_set_offline(node) \ + ({ BUG_ON((node) != 0); clear_bit(node, node_online_map); }) +#define num_online_nodes() 1 + #define memblk_online(memblk) \ ({ BUG_ON((memblk) != 0); test_bit(memblk, memblk_online_map); }) #define memblk_set_online(memblk) \ |