The patch titled
memory hotadd fixes: avoid registering res twice
has been added to the -mm tree. Its filename is
memory-hotadd-fixes-avoid-registering-res-twice.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 registering res twice
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
both of acpi_memory_enable_device() and acpi_memory_add_device() may evaluate
_CRS method.
We should avoid evaluate device's resource twice if we could get it
successfully in past.
Signed-off-by: KAMEZWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Keith Mannthey <kmannth@xxxxxxxxx>
Cc: Yasunori Goto <y-goto@xxxxxxxxxxxxxx>
Cc: Dave Hansen <haveblue@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/acpi/acpi_memhotplug.c | 4 ++++
1 file changed, 4 insertions(+)
diff -puN drivers/acpi/acpi_memhotplug.c~memory-hotadd-fixes-avoid-registering-res-twice drivers/acpi/acpi_memhotplug.c
--- a/drivers/acpi/acpi_memhotplug.c~memory-hotadd-fixes-avoid-registering-res-twice
+++ a/drivers/acpi/acpi_memhotplug.c
@@ -129,11 +129,15 @@ acpi_memory_get_device_resources(struct
struct acpi_memory_info *info, *n;
+ if (!list_empty(&mem_device->res_list))
+ return 0;
+
status = acpi_walk_resources(mem_device->device->handle, METHOD_NAME__CRS,
acpi_memory_get_resource, mem_device);
if (ACPI_FAILURE(status)) {
list_for_each_entry_safe(info, n, &mem_device->res_list, list)
kfree(info);
+ INIT_LIST_HEAD(&mem_device->res_list);
return -EINVAL;
}
_
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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