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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-05-08 02:29:49 +0400 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-05-12 16:14:38 +0400 |
commit | e2ff39400d81233374e780b133496a2296643d7d (patch) | |
tree | 6f96f82ebc9474652a32e7fff8f8d9eb7184eb56 /include/linux/memory_hotplug.h | |
parent | ac212b6980d8d5eda705864fc5a8ecddc6d6eacc (diff) | |
download | linux-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.h | 2 |
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); |