From: Bjorn Helgaas Date: Mon, 21 Sep 2009 19:29:50 +0000 (+0000) Subject: ACPI: identify device tree root by null parent pointer, not ACPI_BUS_TYPE X-Git-Tag: v2.6.32-rc1~18^2~2^2~12 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=859ac9a4be0c753cece0e30a2e4a65fd2cdcaeee;p=pandora-kernel.git 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 Signed-off-by: Len Brown --- Reading git-diff-tree failed