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authorDavid Vrabel <david.vrabel@citrix.com>2015-06-25 18:35:49 +0300
committerDavid Vrabel <david.vrabel@citrix.com>2015-10-23 16:19:58 +0300
commit62cedb9f135794ec26a93ae29e5f0231ab263c84 (patch)
tree391e9f85e552feee52c6527daf7c95548572b6d0 /include/linux/memory_hotplug.h
parent7379047d5585187d1288486d4627873170d0005a (diff)
downloadlinux-62cedb9f135794ec26a93ae29e5f0231ab263c84.tar.xz
mm: memory hotplug with an existing resource
Add add_memory_resource() to add memory using an existing "System RAM" resource. This is useful if the memory region is being located by finding a free resource slot with allocate_resource(). Xen guests will make use of this in their balloon driver to hotplug arbitrary amounts of memory in response to toolstack requests. Signed-off-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com>
Diffstat (limited to 'include/linux/memory_hotplug.h')
-rw-r--r--include/linux/memory_hotplug.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h
index 8f60e899b33c..2ea574ff9714 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -11,6 +11,7 @@ struct zone;
struct pglist_data;
struct mem_section;
struct memory_block;
+struct resource;
#ifdef CONFIG_MEMORY_HOTPLUG
@@ -266,6 +267,7 @@ static inline void remove_memory(int nid, u64 start, u64 size) {}
extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn,
void *arg, int (*func)(struct memory_block *, void *));
extern int add_memory(int nid, u64 start, u64 size);
+extern int add_memory_resource(int nid, struct resource *resource);
extern int zone_for_memory(int nid, u64 start, u64 size, int zone_default,
bool for_device);
extern int arch_add_memory(int nid, u64 start, u64 size, bool for_device);