TononixOS/ubports_kernel_google_msm
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[PATCH] catch valid mem range at onlining memory

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This patch allows hot-add memory which is not aligned to section.

Now, hot-added memory has to be aligned to section size.  Considering big
section sized archs, this is not useful.

When hot-added memory is registerd as iomem resoruce by iomem resource
patch, we can make use of that information to detect valid memory range.

Note: With this, not-aligned memory can be registerd. To allow hot-add
      memory with holes, we have to do more work around add_memory().
      (It doesn't allows add memory to already existing mem section.)

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
KAMEZAWA Hiroyuki
2006-06-27 02:53:36 -07:00
committed by Linus Torvalds
parent 0a54703904
commit 2842f11419
3 changed files with 65 additions and 4 deletions
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3
include/linux/ioport.h
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@@ -105,6 +105,9 @@ extern int allocate_resource(struct resource *root, struct resource *new,
int adjust_resource(struct resource *res, unsigned long start,
unsigned long size);
/* get registered SYSTEM_RAM resources in specified area */
extern int find_next_system_ram(struct resource *res);
/* Convenience shorthand with allocation */
#define request_region(start,n,name) __request_region(&ioport_resource, (start), (n), (name))
#define request_mem_region(start,n,name) __request_region(&iomem_resource, (start), (n), (name))