[PATCH part5 1/7] ACPI, PCI: Use normal list for struct acpi_pci_driver

Yinghai Lu
2012-09-02T21:56:21Z

From: Jiang Liu <jiang.liu@huawei.com>

Use normal list for struct acpi_pci_driver to simplify code.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
drivers/acpi/pci_root.c | 16 +++-------------
include/linux/acpi.h | 2 +-
2 files changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 12791fd..2aec08d 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -72,8 +72,8 @@ static struct acpi_driver acpi_pci_root_driver = {
};

static LIST_HEAD(acpi_pci_roots);
+static LIST_HEAD(acpi_pci_drivers);

-static struct acpi_pci_driver *sub_driver;
static DEFINE_MUTEX(osc_lock);

int acpi_pci_register_driver(struct acpi_pci_driver *driver)
@@ -81,10 +81,7 @@ int acpi_pci_register_driver(struct acpi_pci_driver *driver)
int n = 0;
struct acpi_pci_root *root;

- struct acpi_pci_driver **pptr = &sub_driver;
- while (*pptr)
- pptr = &(*pptr)->next;
- *pptr = driver;
+ list_add_tail(&driver->node, &acpi_pci_drivers);

if (!driver->add)
return 0;
@@ -103,14 +100,7 @@ void acpi_pci_unregister_driver(struct acpi_pci_driver *driver)
{
struct acpi_pci_root *root;

- struct acpi_pci_driver **pptr = &sub_driver;
- while (*pptr) {
- if (*pptr == driver)
- break;
- pptr = &(*pptr)->next;
- }
- BUG_ON(!*pptr);
- *pptr = (*pptr)->next;
+ list_del(&driver->node);

if (!driver->remove)
return;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 3ad510b..a54cf8e 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -138,7 +138,7 @@ void acpi_penalize_isa_irq(int irq, int active);
void acpi_pci_irq_disable (struct pci_dev *dev);

struct acpi_pci_driver {
- struct acpi_pci_driver *next;
+ struct list_head node;
int (*add)(acpi_handle handle);
void (*remove)(acpi_handle handle);
};
--
1.7.7