diff options
| author | Badari Pulavarty <pbadari@us.ibm.com> | 2008-02-05 09:10:18 +0100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2008-02-08 09:52:48 +0100 |
| commit | a99824f327c748b2753f4fa570eb1fefcd6a9c4d (patch) | |
| tree | 47c6df061ade21ce7ebae43b31a39e882c90cf2b /kernel | |
| parent | [POWERPC] Enable hotplug memory remove for 64-bit powerpc (diff) | |
| download | linux-a99824f327c748b2753f4fa570eb1fefcd6a9c4d.tar.xz linux-a99824f327c748b2753f4fa570eb1fefcd6a9c4d.zip | |
[POWERPC] Add arch-specific walk_memory_remove() for 64-bit powerpc
walk_memory_resource() verifies if there are holes in a given memory
range, by checking against /proc/iomem. On x86/ia64 system memory is
represented in /proc/iomem. On powerpc, we don't show system memory as
IO resource in /proc/iomem - instead it's maintained in
/proc/device-tree.
This provides a way for an architecture to provide its own
walk_memory_resource() function. On powerpc, the memory region is
small (16MB), contiguous and non-overlapping. So extra checking
against the device-tree is not needed.
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Kumar Gala <galak@gate.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/resource.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/resource.c b/kernel/resource.c index 2eb553d9b517..82aea814d409 100644 --- a/kernel/resource.c +++ b/kernel/resource.c @@ -228,7 +228,7 @@ int release_resource(struct resource *old) EXPORT_SYMBOL(release_resource); -#ifdef CONFIG_MEMORY_HOTPLUG +#if defined(CONFIG_MEMORY_HOTPLUG) && !defined(CONFIG_ARCH_HAS_WALK_MEMORY) /* * Finds the lowest memory reosurce exists within [res->start.res->end) * the caller must specify res->start, res->end, res->flags. |