The patch titled
memory hotadd fixes: avoid check in acpi
has been added to the -mm tree. Its filename is
memory-hotadd-fixes-avoid-check-in-acpi.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: memory hotadd fixes: avoid check in acpi
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxx>
Cc: Keith Mannthey <kmannth@xxxxxxxxx>
Cc: Yasunori Goto <y-goto@xxxxxxxxxxxxxx>
Cc: Dave Hansen <haveblue@xxxxxxxxxx>
Cc: "Brown, Len" <len.brown@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/acpi/acpi_memhotplug.c | 9 +--------
1 file changed, 1 insertion(+), 8 deletions(-)
diff -puN drivers/acpi/acpi_memhotplug.c~memory-hotadd-fixes-avoid-check-in-acpi drivers/acpi/acpi_memhotplug.c
--- a/drivers/acpi/acpi_memhotplug.c~memory-hotadd-fixes-avoid-check-in-acpi
+++ a/drivers/acpi/acpi_memhotplug.c
@@ -230,17 +230,10 @@ static int acpi_memory_enable_device(str
* (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;
_
Patches currently in -mm which might be from kamezawa.hiroyu@xxxxxxxxxxxxxx are
memory-hotadd-fixes-not-aligned-memory-hotadd.patch
memory-hotadd-fixes-change-find_next_system_rams.patch
memory-hotadd-fixes-find_next_system_ram-catch-range.patch
memory-hotadd-fixes-avoid-check-in-acpi.patch
memory-hotadd-fixes-avoid-registering-res-twice.patch
namespaces-utsname-sysctl-hack.patch
reiser4-hardirq-include-fix.patch
-
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