On Friday, October 19, 2012 01:09:53 PM Toshi Kani wrote:
> Added CPU hot-remove support through an ACPI eject notification.
> It calls acpi_bus_hot_remove_device(), which shares the same code
> path with the sysfs eject operation. acpi_os_hotplug_execute()
> serializes hot-remove operations between ACPI hot-remove and sysfs
> eject requests.
>
> Signed-off-by: Toshi Kani <[email protected]>
> Reviewed-by: Yasuaki Ishimatsu <[email protected]>
> Tested-by: IgorMammedov <[email protected]>
> Tested-by: Vijay Mohan Pandarathil <[email protected]>
> Tested-by: Prarit Bhargava <[email protected]>
This doesn't build with modular processor driver.
Thanks,
Rafael
> ---
> v2: Rebased to the current Linus's tree.
> ---
> drivers/acpi/processor_driver.c | 27 +++++++++++++++++----------
> 1 file changed, 17 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
> index e78c2a5..1cc9652 100644
> --- a/drivers/acpi/processor_driver.c
> +++ b/drivers/acpi/processor_driver.c
> @@ -694,8 +694,8 @@ int acpi_processor_device_add(acpi_handle handle, struct
> acpi_device **device)
> static void acpi_processor_hotplug_notify(acpi_handle handle,
> u32 event, void *data)
> {
> - struct acpi_processor *pr;
> struct acpi_device *device = NULL;
> + struct acpi_eject_event *ej_event = NULL;
> u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */
> int result;
>
> @@ -727,20 +727,27 @@ static void acpi_processor_hotplug_notify(acpi_handle
> handle,
> "received ACPI_NOTIFY_EJECT_REQUEST\n"));
>
> if (acpi_bus_get_device(handle, &device)) {
> - printk(KERN_ERR PREFIX
> - "Device don't exist, dropping EJECT\n");
> + pr_err(PREFIX "Device don't exist, dropping EJECT\n");
> break;
> }
> - pr = acpi_driver_data(device);
> - if (!pr) {
> - printk(KERN_ERR PREFIX
> - "Driver data is NULL, dropping EJECT\n");
> + if (!acpi_driver_data(device)) {
> + pr_err(PREFIX "Driver data is NULL, dropping EJECT\n");
> break;
> }
>
> - /* REVISIT: update when eject is supported */
> - ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
> - break;
> + ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
> + if (!ej_event) {
> + pr_err(PREFIX "No memory, dropping EJECT\n");
> + break;
> + }
> +
> + ej_event->handle = handle;
> + ej_event->event = ACPI_NOTIFY_EJECT_REQUEST;
> + acpi_os_hotplug_execute(acpi_bus_hot_remove_device,
> + (void *)ej_event);
> +
> + /* eject is performed asynchronously */
> + return;
>
> default:
> ACPI_DEBUG_PRINT((ACPI_DB_INFO,
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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