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authorGrant Likely <grant.likely@linaro.org>2014-10-03 16:28:27 +0100
committerGrant Likely <grant.likely@linaro.org>2014-11-04 13:29:38 +0000
commit5063e25a302e6a83f6590d9a06bd5f6400b17430 (patch)
treebd6aafd28fb65ea19cd1535fd9a53263b42a68c0 /drivers/of/pdt.c
parente7a00e4210e4cc980e3ba67ec7301af54061d14b (diff)
downloadlinux-stericsson-5063e25a302e6a83f6590d9a06bd5f6400b17430.tar.gz
of: Eliminate of_allnodes list
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>
Diffstat (limited to 'drivers/of/pdt.c')
-rw-r--r--drivers/of/pdt.c27
1 files changed, 9 insertions, 18 deletions
diff --git a/drivers/of/pdt.c b/drivers/of/pdt.c
index 36b4035881b0..d2acae825af9 100644
--- a/drivers/of/pdt.c
+++ b/drivers/of/pdt.c
@@ -25,8 +25,7 @@
static struct of_pdt_ops *of_pdt_prom_ops __initdata;
-void __initdata (*of_pdt_build_more)(struct device_node *dp,
- struct device_node ***nextp);
+void __initdata (*of_pdt_build_more)(struct device_node *dp);
#if defined(CONFIG_SPARC)
unsigned int of_pdt_unique_id __initdata;
@@ -192,8 +191,7 @@ static struct device_node * __init of_pdt_create_node(phandle node,
}
static struct device_node * __init of_pdt_build_tree(struct device_node *parent,
- phandle node,
- struct device_node ***nextp)
+ phandle node)
{
struct device_node *ret = NULL, *prev_sibling = NULL;
struct device_node *dp;
@@ -210,16 +208,12 @@ static struct device_node * __init of_pdt_build_tree(struct device_node *parent,
ret = dp;
prev_sibling = dp;
- *(*nextp) = dp;
- *nextp = &dp->allnext;
-
dp->full_name = of_pdt_build_full_name(dp);
- dp->child = of_pdt_build_tree(dp,
- of_pdt_prom_ops->getchild(node), nextp);
+ dp->child = of_pdt_build_tree(dp, of_pdt_prom_ops->getchild(node));
if (of_pdt_build_more)
- of_pdt_build_more(dp, nextp);
+ of_pdt_build_more(dp);
node = of_pdt_prom_ops->getsibling(node);
}
@@ -234,20 +228,17 @@ static void * __init kernel_tree_alloc(u64 size, u64 align)
void __init of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops)
{
- struct device_node **nextp;
-
BUG_ON(!ops);
of_pdt_prom_ops = ops;
- of_allnodes = of_pdt_create_node(root_node, NULL);
+ of_root = of_pdt_create_node(root_node, NULL);
#if defined(CONFIG_SPARC)
- of_allnodes->path_component_name = "";
+ of_root->path_component_name = "";
#endif
- of_allnodes->full_name = "/";
+ of_root->full_name = "/";
- nextp = &of_allnodes->allnext;
- of_allnodes->child = of_pdt_build_tree(of_allnodes,
- of_pdt_prom_ops->getchild(of_allnodes->phandle), &nextp);
+ of_root->child = of_pdt_build_tree(of_root,
+ of_pdt_prom_ops->getchild(of_root->phandle));
/* Get pointer to "/chosen" and "/aliases" nodes for use everywhere */
of_alias_scan(kernel_tree_alloc);