From 6a9ceb31c06f1e8d50be79259756fda73234868d Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Thu, 8 Dec 2011 10:22:07 -0800
Subject: [PATCH] memblock: Separate out memblock_isolate_range() from
 memblock_set_node()

memblock_set_node() operates in three steps - break regions crossing
boundaries, set nid and merge back regions.  This patch separates the
first part into a separate function - memblock_isolate_range(), which
breaks regions crossing range boundaries and returns range index range
for regions properly contained in the specified memory range.

This doesn't introduce any behavior change and will be used to further
unify region handling.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Yinghai Lu <yinghai@kernel.org>
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