From 2c22e6520ac87d8b12d4d9941e81d4119f2d903c Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 25 Nov 2013 00:52:21 +0100
Subject: [PATCH] ACPI / scan: Use direct recurrence for device hierarchy walks

Rework acpi_bus_trim() and acpi_bus_device_attach(), which is
renamed as acpi_bus_attach(), to walk the list of each device
object's children directly and call themselves recursively for
each child instead of using acpi_walk_namespace().  This
simplifies the code quite a bit and avoids the overhead of
callbacks and the ACPICA's internal processing which are not
really necessary for these two routines.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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