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authorBjorn Helgaas <bjorn.helgaas@hp.com>2009-09-21 15:29:50 -0400
committerLen Brown <len.brown@intel.com>2009-09-25 14:24:29 -0400
commit859ac9a4be0c753cece0e30a2e4a65fd2cdcaeee (patch)
tree10962790433ee0865ab6506c69981e8248368e46 /include/acpi
parentadc08e2035f1859d4b129f42b2c2305ef090d226 (diff)
ACPI: identify device tree root by null parent pointer, not ACPI_BUS_TYPE
We can identify the root of the ACPI device tree by the fact that it has no parent. This is simpler than passing around ACPI_BUS_TYPE_SYSTEM and will help remove special treatment of the device tree root. Currently, we add the root by hand with ACPI_BUS_TYPE_SYSTEM. If we traverse the tree treating the root as just another device and use acpi_get_type(), the root shows up as ACPI_TYPE_DEVICE. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/acpi')
-rw-r--r--include/acpi/acpi_bus.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 8456e8cbf9fd..bc7a69516dce 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -70,7 +70,6 @@ enum acpi_bus_device_type {
70 ACPI_BUS_TYPE_POWER, 70 ACPI_BUS_TYPE_POWER,
71 ACPI_BUS_TYPE_PROCESSOR, 71 ACPI_BUS_TYPE_PROCESSOR,
72 ACPI_BUS_TYPE_THERMAL, 72 ACPI_BUS_TYPE_THERMAL,
73 ACPI_BUS_TYPE_SYSTEM,
74 ACPI_BUS_TYPE_POWER_BUTTON, 73 ACPI_BUS_TYPE_POWER_BUTTON,
75 ACPI_BUS_TYPE_SLEEP_BUTTON, 74 ACPI_BUS_TYPE_SLEEP_BUTTON,
76 ACPI_BUS_DEVICE_TYPE_COUNT 75 ACPI_BUS_DEVICE_TYPE_COUNT