diff options
Diffstat (limited to 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 83d37a401b3b..0b11a8543441 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -21,6 +21,7 @@ #include <linux/memory_hotplug.h> #include <linux/highmem.h> #include <linux/vmalloc.h> +#include <linux/ioport.h> #include <asm/tlbflush.h> @@ -192,6 +193,27 @@ static void rollback_node_hotadd(int nid, pg_data_t *pgdat) return; } +/* add this memory to iomem resource */ +static void register_memory_resource(u64 start, u64 size) +{ + struct resource *res; + + res = kzalloc(sizeof(struct resource), GFP_KERNEL); + BUG_ON(!res); + + res->name = "System RAM"; + res->start = start; + res->end = start + size - 1; + res->flags = IORESOURCE_MEM; + if (request_resource(&iomem_resource, res) < 0) { + printk("System RAM resource %llx - %llx cannot be added\n", + (unsigned long long)res->start, (unsigned long long)res->end); + kfree(res); + } +} + + + int add_memory(int nid, u64 start, u64 size) { pg_data_t *pgdat = NULL; @@ -217,6 +239,9 @@ int add_memory(int nid, u64 start, u64 size) /* we online node here. we have no error path from here. */ node_set_online(nid); + /* register this memory as resource */ + register_memory_resource(start, size); + return ret; error: /* rollback pgdat allocation and others */ |