diff options
| author |   KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> | 2007-10-16 01:26:10 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:01 -0700 |
| commit | 75884fb1c6388f3713ddcca662f3647b3129aaeb (patch) | |
| tree | 7debdd89fd94d099de3d3763b47af00ef6359d9d /include/linux/memory_hotplug.h | |
| parent | Breakout page_order() to internal.h to avoid special knowledge of the buddy allocator (diff) | |
| download | linux-dev-75884fb1c6388f3713ddcca662f3647b3129aaeb.tar.xz linux-dev-75884fb1c6388f3713ddcca662f3647b3129aaeb.zip | |
memory unplug: memory hotplug cleanup
A clean up patch for "scanning memory resource [start, end)" operation.
Now, find_next_system_ram() function is used in memory hotplug, but this
interface is not easy to use and codes are complicated.
This patch adds walk_memory_resouce(start,len,arg,func) function.
The function 'func' is called per valid memory resouce range in [start,pfn).
[pbadari@us.ibm.com: Error handling in walk_memory_resource()]
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/memory_hotplug.h')
| -rw-r--r-- | include/linux/memory_hotplug.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index b573d1ec871f..0a14dad95453 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -63,6 +63,14 @@ extern int online_pages(unsigned long, unsigned long); extern int __add_pages(struct zone *zone, unsigned long start_pfn, unsigned long nr_pages); +/* + * Walk thorugh all memory which is registered as resource. + * arg is (start_pfn, nr_pages, private_arg_pointer) + */ +extern int walk_memory_resource(unsigned long start_pfn, + unsigned long nr_pages, void *arg, + int (*func)(unsigned long, unsigned long, void *)); + #ifdef CONFIG_NUMA extern int memory_add_physaddr_to_nid(u64 start); #else |