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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-05-08 02:29:49 +0400
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-05-12 16:14:38 +0400
commite2ff39400d81233374e780b133496a2296643d7d (patch)
tree6f96f82ebc9474652a32e7fff8f8d9eb7184eb56 /include/linux/memory_hotplug.h
parentac212b6980d8d5eda705864fc5a8ecddc6d6eacc (diff)
downloadlinux-e2ff39400d81233374e780b133496a2296643d7d.tar.xz
ACPI / memhotplug: Bind removable memory blocks to ACPI device nodes
During ACPI memory hotplug configuration bind memory blocks residing in modules removable through the standard ACPI mechanism to struct acpi_device objects associated with ACPI namespace objects representing those modules. Accordingly, unbind those memory blocks from the struct acpi_device objects when the memory modules in question are being removed. When "offline" operation for devices representing memory blocks is introduced, this will allow the ACPI core's device hot-remove code to use it to carry out remove_memory() for those memory blocks and check the results of that before it actually removes the modules holding them from the system. Since walk_memory_range() is used for accessing all memory blocks corresponding to a given ACPI namespace object, it is exported from memory_hotplug.c so that the code in acpi_memhotplug.c can use it. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Vasilis Liaskovitis <vasilis.liaskovitis@profitbricks.com> Reviewed-by: Toshi Kani <toshi.kani@hp.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 3e622c610925..2975b7b2a9d8 100644
--- a/include/linux/memory_hotplug.h
+++ b/include/linux/memory_hotplug.h
@@ -245,6 +245,8 @@ static inline int is_mem_section_removable(unsigned long pfn,
static inline void try_offline_node(int nid) {}
#endif /* CONFIG_MEMORY_HOTREMOVE */
+extern int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn,
+ void *arg, int (*func)(struct memory_block *, void *));
extern int mem_online_node(int nid);
extern int add_memory(int nid, u64 start, u64 size);
extern int arch_add_memory(int nid, u64 start, u64 size);