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    SubjectRe: [PATCH v2 1/7] ACPI: Add CONFIG_HOTPLUG_OST option
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    On Fri, 2012-05-11 at 00:40 +0800, Jiang Liu wrote:
    > On 05/09/2012 04:12 AM, Toshi Kani wrote:
    > > Added CONFIG_ACPI_HOTPLUG_OPT option. When this config option is disabled,
    > > this patchset has no effect on the platform. This option is disabled by
    > > default. The dependency list assures consistent behavior among CPU, memory
    > > and container hotplug operations with regarding the _OST support.
    > Seems also need to enhance the acpiphp driver for PCI hotplug operations too.
    > acpiphp driver is also based on the ACPI device hotplug model.

    Good question. ACPI PCI hotplug is a legacy method, which is being
    replaced by PCI native hotplug. I expect PCI native hotplug will be
    used for any platforms supporting PCI-E. Since this _OST support is
    targeted for new platforms (as _OST is not supported on the current
    platforms), I thought that it would be prudent to avoid changing PCI
    hotplug code for this.


    Thanks,
    -Toshi


    > >
    > > Signed-off-by: Toshi Kani <toshi.kani@hp.com>
    > > ---
    > > drivers/acpi/Kconfig | 14 ++++++++++++++
    > > 1 files changed, 14 insertions(+), 0 deletions(-)
    > >
    > > diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
    > > index 47768ff..1e3a756 100644
    > > --- a/drivers/acpi/Kconfig
    > > +++ b/drivers/acpi/Kconfig
    > > @@ -351,6 +351,20 @@ config ACPI_HOTPLUG_MEMORY
    > > To compile this driver as a module, choose M here:
    > > the module will be called acpi_memhotplug.
    > >
    > > +config ACPI_HOTPLUG_OST
    > > + bool "Hotplug Status Indication Support"
    > > + depends on ACPI_HOTPLUG_CPU
    > > + depends on ACPI_HOTPLUG_MEMORY
    > > + depends on ACPI_CONTAINER
    > > + default n
    > > + help
    > > + This option enables the use of the ACPI OSPM Status Indication
    > > + (_OST), if available, for the platform to determine the status
    > > + of various hotplug operations. Some platforms may require this
    > > + option be enabled to track the status of hotplug operations.
    > > + This option has no effect when the platform does not support
    > > + _OST.
    > > +
    > > config ACPI_SBS
    > > tristate "Smart Battery System"
    > > depends on X86
    >




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