On Tuesday, May 14, 2013 12:08:29 AM Jiang Liu wrote:
> Now the global list acpi_pci_roots pci_root.c is useless, remove it.
Well, are patches [1-4/9] needed for that or does it apply without them?
Rafael
> Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
> Cc: Len Brown <lenb@xxxxxxxxxx>
> Cc: "Rafael J. Wysocki" <rjw@xxxxxxx>
> Cc: linux-acpi@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> ---
> drivers/acpi/pci_root.c | 25 +++----------------------
> include/acpi/acpi_bus.h | 1 -
> 2 files changed, 3 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
> index b80e06e..91ddfd6 100644
> --- a/drivers/acpi/pci_root.c
> +++ b/drivers/acpi/pci_root.c
> @@ -65,10 +65,6 @@ static struct acpi_scan_handler pci_root_handler = {
> .detach = acpi_pci_root_remove,
> };
>
> -/* Lock to protect both acpi_pci_roots lists */
> -static DEFINE_MUTEX(acpi_pci_root_lock);
> -static LIST_HEAD(acpi_pci_roots);
> -
> static DEFINE_MUTEX(osc_lock);
>
> /**
> @@ -423,7 +419,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
> }
> }
>
> - INIT_LIST_HEAD(&root->node);
> root->device = device;
> root->segment = segment & 0xFFFF;
> strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME);
> @@ -501,10 +496,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
> * TBD: Need PCI interface for enumeration/configuration of roots.
> */
>
> - mutex_lock(&acpi_pci_root_lock);
> - list_add_tail(&root->node, &acpi_pci_roots);
> - mutex_unlock(&acpi_pci_root_lock);
> -
> /*
> * Scan the Root Bridge
> * --------------------
> @@ -518,7 +509,7 @@ static int acpi_pci_root_add(struct acpi_device *device,
> "Bus %04x:%02x not present in PCI namespace\n",
> root->segment, (unsigned int)root->secondary.start);
> result = -ENODEV;
> - goto out_del_root;
> + goto end;
> }
>
> /* ASPM setting */
> @@ -538,20 +529,13 @@ static int acpi_pci_root_add(struct acpi_device *device,
> if (system_state != SYSTEM_BOOTING) {
> pcibios_resource_survey_bus(root->bus);
> pci_assign_unassigned_bus_resources(root->bus);
> - }
> -
> - /* need to after hot-added ioapic is registered */
> - if (system_state != SYSTEM_BOOTING)
> + /* need to after hot-added ioapic is registered */
> pci_enable_bridges(root->bus);
> + }
>
> pci_bus_add_devices(root->bus);
> return 1;
>
> -out_del_root:
> - mutex_lock(&acpi_pci_root_lock);
> - list_del(&root->node);
> - mutex_unlock(&acpi_pci_root_lock);
> -
> end:
> kfree(root);
> return result;
> @@ -568,9 +552,6 @@ static void acpi_pci_root_remove(struct acpi_device *device)
>
> pci_remove_root_bus(root->bus);
>
> - mutex_lock(&acpi_pci_root_lock);
> - list_del(&root->node);
> - mutex_unlock(&acpi_pci_root_lock);
> kfree(root);
> }
>
> diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
> index 22ba56e..4eb9a88 100644
> --- a/include/acpi/acpi_bus.h
> +++ b/include/acpi/acpi_bus.h
> @@ -447,7 +447,6 @@ int register_acpi_bus_type(struct acpi_bus_type *);
> int unregister_acpi_bus_type(struct acpi_bus_type *);
>
> struct acpi_pci_root {
> - struct list_head node;
> struct acpi_device * device;
> struct pci_bus *bus;
> u16 segment;
>
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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