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authorJiang Liu <jiang.liu@linux.intel.com>2014-02-19 14:02:17 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-02-21 00:27:47 +0100
commit772c53990fc29a34aec539abc6b2a1edbab8b2b5 (patch)
tree5c7fba628d7b7139cb5af5856df2ba45910a0af6 /drivers/xen/xen-acpi-pad.c
parent8b296d9412a087c1e2191d3e7448c76d9498714f (diff)
ACPI / PAD / xen: use acpi_evaluate_ost() to replace open-coded version
Use public function acpi_evaluate_ost() to replace open-coded version of evaluating ACPI _OST method. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/xen/xen-acpi-pad.c')
-rw-r--r--drivers/xen/xen-acpi-pad.c26
1 files changed, 7 insertions, 19 deletions
diff --git a/drivers/xen/xen-acpi-pad.c b/drivers/xen/xen-acpi-pad.c
index 40c4bc06b5fa..f83b754505f8 100644
--- a/drivers/xen/xen-acpi-pad.c
+++ b/drivers/xen/xen-acpi-pad.c
@@ -77,27 +77,14 @@ static int acpi_pad_pur(acpi_handle handle)
return num;
}
-/* Notify firmware how many CPUs are idle */
-static void acpi_pad_ost(acpi_handle handle, int stat,
- uint32_t idle_nums)
-{
- union acpi_object params[3] = {
- {.type = ACPI_TYPE_INTEGER,},
- {.type = ACPI_TYPE_INTEGER,},
- {.type = ACPI_TYPE_BUFFER,},
- };
- struct acpi_object_list arg_list = {3, params};
-
- params[0].integer.value = ACPI_PROCESSOR_AGGREGATOR_NOTIFY;
- params[1].integer.value = stat;
- params[2].buffer.length = 4;
- params[2].buffer.pointer = (void *)&idle_nums;
- acpi_evaluate_object(handle, "_OST", &arg_list, NULL);
-}
-
static void acpi_pad_handle_notify(acpi_handle handle)
{
int idle_nums;
+ struct acpi_buffer param = {
+ .length = 4,
+ .pointer = (void *)&idle_nums,
+ };
+
mutex_lock(&xen_cpu_lock);
idle_nums = acpi_pad_pur(handle);
@@ -109,7 +96,8 @@ static void acpi_pad_handle_notify(acpi_handle handle)
idle_nums = xen_acpi_pad_idle_cpus(idle_nums)
?: xen_acpi_pad_idle_cpus_num();
if (idle_nums >= 0)
- acpi_pad_ost(handle, 0, idle_nums);
+ acpi_evaluate_ost(handle, ACPI_PROCESSOR_AGGREGATOR_NOTIFY,
+ 0, &param);
mutex_unlock(&xen_cpu_lock);
}