From 088186ded490ced80758200cf8f906ed741df306 Mon Sep 17 00:00:00 2001
From: Dave C Boutcher <sleddog@us.ibm.com>
Date: Thu, 12 Jan 2006 16:08:27 -0600
Subject: [PATCH] [PATCH] powerpc: Add/remove/update properties in firmware
 device tree

Add support for updating and removing device tree
properties.  Since we hand out pointers to properties with gay
abandon, we can't just free the property storage.  Instead we
move deleted, or the old copy of an updated property, to a
"dead properties" list.

Also note, its not feasable to kref device tree properties.
we call get_property() all over the kernel in a wild variety
of contexts.

One consequence of this change is that we now take a
read_lock(&devtree_lock) when doing get_property().

Signed-off-by: Dave Boutcher <sleddog@us.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
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