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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-05-08 00:29:49 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-05-12 14:14:38 +0200 |
| commit | e2ff39400d81233374e780b133496a2296643d7d (patch) | |
| tree | 6f96f82ebc9474652a32e7fff8f8d9eb7184eb56 /mm/memory_hotplug.c | |
| parent | ac212b6980d8d5eda705864fc5a8ecddc6d6eacc (diff) | |
| download | lwn-e2ff39400d81233374e780b133496a2296643d7d.tar.gz lwn-e2ff39400d81233374e780b133496a2296643d7d.zip | |
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 'mm/memory_hotplug.c')
| -rw-r--r-- | mm/memory_hotplug.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index a221fac1f47d..5ea1287ee91f 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -1618,6 +1618,7 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages) { return __offline_pages(start_pfn, start_pfn + nr_pages, 120 * HZ); } +#endif /* CONFIG_MEMORY_HOTREMOVE */ /** * walk_memory_range - walks through all mem sections in [start_pfn, end_pfn) @@ -1631,7 +1632,7 @@ int offline_pages(unsigned long start_pfn, unsigned long nr_pages) * * Returns the return value of func. */ -static int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, +int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, void *arg, int (*func)(struct memory_block *, void *)) { struct memory_block *mem = NULL; @@ -1668,6 +1669,7 @@ static int walk_memory_range(unsigned long start_pfn, unsigned long end_pfn, return 0; } +#ifdef CONFIG_MEMORY_HOTREMOVE /** * offline_memory_block_cb - callback function for offlining memory block * @mem: the memory block to be offlined |