diff options
Diffstat (limited to 'target/linux/brcm63xx/patches-3.14/001-of-Create-unlocked-version-of-for_each_child_of_node.patch')
| -rw-r--r-- | target/linux/brcm63xx/patches-3.14/001-of-Create-unlocked-version-of-for_each_child_of_node.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/target/linux/brcm63xx/patches-3.14/001-of-Create-unlocked-version-of-for_each_child_of_node.patch b/target/linux/brcm63xx/patches-3.14/001-of-Create-unlocked-version-of-for_each_child_of_node.patch new file mode 100644 index 0000000..1395789 --- /dev/null +++ b/target/linux/brcm63xx/patches-3.14/001-of-Create-unlocked-version-of-for_each_child_of_node.patch @@ -0,0 +1,52 @@ +From 0d0e02d605c5696a5076510f564fefe659127aa4 Mon Sep 17 00:00:00 2001 +From: Grant Likely <grant.likely@linaro.org> +Date: Thu, 22 May 2014 01:04:17 +0900 +Subject: [PATCH] of: Create unlocked version of for_each_child_of_node() + +When iterating over nodes, sometimes it needs to be done when the DT +lock is already held. This patch makes an unlocked version of the +for_each_child_of_node() macro. + +Signed-off-by: Grant Likely <grant.likely@linaro.org> +--- + drivers/of/base.c | 22 +++++++++++++++++----- + 1 file changed, 17 insertions(+), 5 deletions(-) + +--- a/drivers/of/base.c ++++ b/drivers/of/base.c +@@ -545,6 +545,22 @@ struct device_node *of_get_next_parent(s + } + EXPORT_SYMBOL(of_get_next_parent); + ++static struct device_node *__of_get_next_child(const struct device_node *node, ++ struct device_node *prev) ++{ ++ struct device_node *next; ++ ++ next = prev ? prev->sibling : node->child; ++ for (; next; next = next->sibling) ++ if (of_node_get(next)) ++ break; ++ of_node_put(prev); ++ return next; ++} ++#define __for_each_child_of_node(parent, child) \ ++ for (child = __of_get_next_child(parent, NULL); child != NULL; \ ++ child = __of_get_next_child(parent, child)) ++ + /** + * of_get_next_child - Iterate a node childs + * @node: parent node +@@ -560,11 +576,7 @@ struct device_node *of_get_next_child(co + unsigned long flags; + + raw_spin_lock_irqsave(&devtree_lock, flags); +- next = prev ? prev->sibling : node->child; +- for (; next; next = next->sibling) +- if (of_node_get(next)) +- break; +- of_node_put(prev); ++ next = __of_get_next_child(node, prev); + raw_spin_unlock_irqrestore(&devtree_lock, flags); + return next; + } |