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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2006-08-05 12:15:02 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-06 08:57:49 -0700
commitfa25d8d6d3fa0fecd00cd4b909011291eae9257d (patch)
tree641304544db303a499387b52940aa0b52dcc0311 /drivers/acpi
parent58c1b5b079071d82b2f924000b7e8fb5585ce7d8 (diff)
downloadblackbird-op-linux-fa25d8d6d3fa0fecd00cd4b909011291eae9257d.tar.gz
blackbird-op-linux-fa25d8d6d3fa0fecd00cd4b909011291eae9257d.zip
[PATCH] memory hotadd fixes: avoid check in acpi
add_memory() does all necessary check to avoid collision. then, acpi layer doesn't have to check region by itself. (*) pfn_valid() just returns page struct is valid or not. It returns 0 if a section has been already added even is ioresource is not added. ioresource collision check in mm/memory_hotplug.c can do more precise collistion check. added enabled bit check just for sanity check.. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Keith Mannthey <kmannth@gmail.com> Cc: Yasunori Goto <y-goto@jp.fujitsu.com> Cc: Dave Hansen <haveblue@us.ibm.com> Cc: "Brown, Len" <len.brown@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/acpi_memhotplug.c9
1 files changed, 1 insertions, 8 deletions
diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 81e970adeab3..e9175eaeb1df 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -230,17 +230,10 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
* (i.e. memory-hot-remove function)
*/
list_for_each_entry(info, &mem_device->res_list, list) {
- u64 start_pfn, end_pfn;
-
- start_pfn = info->start_addr >> PAGE_SHIFT;
- end_pfn = (info->start_addr + info->length - 1) >> PAGE_SHIFT;
-
- if (pfn_valid(start_pfn) || pfn_valid(end_pfn)) {
- /* already enabled. try next area */
+ if (info->enabled) { /* just sanity check...*/
num_enabled++;
continue;
}
-
result = add_memory(node, info->start_addr, info->length);
if (result)
continue;
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