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of: Eliminate of_allnodes list

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The device tree structure is composed of two lists; the 'allnodes' list
which is a singly linked list containing every node in the tree, and the
child->parent structure where each parent node has a singly linked list
of children. All of the data in the allnodes list can be easily
reproduced with the parent-child lists, so of_allnodes is actually
unnecessary. Remove it entirely which saves a bit of memory and
simplifies the data structure quite a lot.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Gaurav Minocha <gaurav.minocha.os@gmail.com>
Cc: Pantelis Antoniou <pantelis@pantelis.antoniou@konsulko.com>
This commit is contained in:
Grant Likely
2014-10-03 16:28:27 +01:00
parent e7a00e4210
commit 5063e25a30
10 changed files with 98 additions and 133 deletions
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13
drivers/of/dynamic.c
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@@ -117,8 +117,6 @@ void __of_attach_node(struct device_node *np)
np->child = NULL;
np->sibling = np->parent->child;
np->allnext = np->parent->allnext;
np->parent->allnext = np;
np->parent->child = np;
of_node_clear_flag(np, OF_DETACHED);
}
@@ -154,17 +152,6 @@ void __of_detach_node(struct device_node *np)
if (WARN_ON(!parent))
return;
if (of_allnodes == np)
of_allnodes = np->allnext;
else {
struct device_node *prev;
for (prev = of_allnodes;
prev->allnext != np;
prev = prev->allnext)
;
prev->allnext = np->allnext;
}
if (parent->child == np)
parent->child = np->sibling;
else {