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    Subject[RFC][PATCH 3/3] PM: Asynchronous suspend and resume for ACPI battery
    Date
    Allow the ACPI battery device to be resumed and suspended
    asynchronously.

    This only means that the driver's suspend and resume callbacks may
    be executed in parallel with the callbacks of devices that don't
    directly depend on the battery device (i.e. that are not its parent
    or children).

    Index: linux-2.6/drivers/acpi/battery.c
    ===================================================================
    --- linux-2.6.orig/drivers/acpi/battery.c
    +++ linux-2.6/drivers/acpi/battery.c
    @@ -837,6 +837,7 @@ static int acpi_battery_add(struct acpi_
    printk(KERN_INFO PREFIX "%s Slot [%s] (battery %s)\n",
    ACPI_BATTERY_DEVICE_NAME, acpi_device_bid(device),
    device->status.battery_present ? "present" : "absent");
    + device_enable_async_suspend(&device->dev, true);
    } else {
    #ifdef CONFIG_ACPI_PROCFS_POWER
    acpi_battery_remove_fs(device);

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