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Consolidate of_get_parent

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This requires creating dummy of_node_{get,put} routines for sparc and
sparc64.  It also adds a read_lock around the parent accesses.

Signed-off-by: Stephen Rothwell <[email protected]>
Acked-by: Paul Mackerras <[email protected]>
Acked-by: David S. Miller <[email protected]>
This commit is contained in:
Stephen Rothwell 2007-04-24 17:16:16 +10:00
commit e679c5f445
6 changed files with 39 additions and 47 deletions
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21
drivers/of/base.c
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@ -113,3 +113,24 @@ int of_device_is_compatible(const struct device_node *device,
return 0;
}
EXPORT_SYMBOL(of_device_is_compatible);
/**
* of_get_parent - Get a node's parent if any
* @node: Node to get parent
*
* Returns a node pointer with refcount incremented, use
* of_node_put() on it when done.
*/
struct device_node *of_get_parent(const struct device_node *node)
{
struct device_node *np;
if (!node)
return NULL;
read_lock(&devtree_lock);
np = of_node_get(node->parent);
read_unlock(&devtree_lock);
return np;
}
EXPORT_SYMBOL(of_get_parent);