diff options
| author |   Justin Chen <justin.chen@hp.com> | 2006-12-06 10:17:10 -0700 |
|---|---|---|
| committer |   Len Brown <len.brown@intel.com> | 2007-01-16 16:41:56 -0500 |
| commit | d91a0078476ca536d76419f3b53196873b2931bc (patch) | |
| tree | dc79451e8c7a9518386ace82e35b07bb26fda1df /drivers/acpi/pci_root.c | |
| parent | Linux v2.6.20-rc5 (diff) | |
| download | linux-dev-d91a0078476ca536d76419f3b53196873b2931bc.tar.xz linux-dev-d91a0078476ca536d76419f3b53196873b2931bc.zip | |
ACPI: Optimize acpi_get_pci_rootbridge_handle() to boot faster
Move acpi_get_pci_rootbridge_handle() from glue.c to pci_root.c and get the
root bridge ACPI handles by searching the &acpi_pci_roots list instead of
walking through the ACPI name space. This significantly reduces boot time
on large I/O systems.
Signed-off-by: Justin Chen <justin.chen@hp.com>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/pci_root.c')
| -rw-r--r-- | drivers/acpi/pci_root.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c index a860efa2c562..1f06229040ac 100644 --- a/drivers/acpi/pci_root.c +++ b/drivers/acpi/pci_root.c @@ -117,6 +117,19 @@ void acpi_pci_unregister_driver(struct acpi_pci_driver *driver) EXPORT_SYMBOL(acpi_pci_unregister_driver); +acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) +{ + struct acpi_pci_root *tmp; + + list_for_each_entry(tmp, &acpi_pci_roots, node) { + if ((tmp->id.segment == (u16) seg) && (tmp->id.bus == (u16) bus)) + return tmp->device->handle; + } + return NULL; +} + +EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); + static acpi_status get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) { |