PCI/ACPI: Remove unused global list acpi_pci_roots

Now the global list acpi_pci_roots pci_root.c is useless, remove it.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Len Brown <lenb@kernel.org>

1 files changed, 1 insertions, 18 deletions

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 852fb96f94e5..18b7ab2dee4f 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);
@@ -447,10 +442,6 @@ 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
          * --------------------
@@ -464,7 +455,7 @@ 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;
         }
 
         /* Indicate support for various _OSC capabilities. */
@@ -545,11 +536,6 @@ static int acpi_pci_root_add(struct acpi_device *device,
         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;
@@ -566,9 +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);
 }