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authorGavin Shan <gwshan@linux.vnet.ibm.com>2015-11-05 00:12:49 +1100
committerRob Herring <robh@kernel.org>2016-01-13 16:10:37 -0600
commit183223770ae8625df8966ed15811d1b3ee8720aa (patch)
treea7f994ffd55b80d765ac01283d7f5412fdd5d383 /drivers/of/dynamic.c
parentdc17340e3041511850ff6ec7299551284d6c0eb1 (diff)
downloadlinux-183223770ae8625df8966ed15811d1b3ee8720aa.tar.bz2
drivers/of: Export OF changeset functions
The PowerNV PCI hotplug driver is going to use the OF changeset to manage the changed device sub-tree. This exports those OF changeset functions for that. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of/dynamic.c')
-rw-r--r--drivers/of/dynamic.c65
1 files changed, 46 insertions, 19 deletions
diff --git a/drivers/of/dynamic.c b/drivers/of/dynamic.c
index 53826b84e0ec..c647bd1b6903 100644
--- a/drivers/of/dynamic.c
+++ b/drivers/of/dynamic.c
@@ -646,6 +646,7 @@ void of_changeset_init(struct of_changeset *ocs)
memset(ocs, 0, sizeof(*ocs));
INIT_LIST_HEAD(&ocs->entries);
}
+EXPORT_SYMBOL_GPL(of_changeset_init);
/**
* of_changeset_destroy - Destroy a changeset
@@ -662,20 +663,9 @@ void of_changeset_destroy(struct of_changeset *ocs)
list_for_each_entry_safe_reverse(ce, cen, &ocs->entries, node)
__of_changeset_entry_destroy(ce);
}
+EXPORT_SYMBOL_GPL(of_changeset_destroy);
-/**
- * of_changeset_apply - Applies a changeset
- *
- * @ocs: changeset pointer
- *
- * Applies a changeset to the live tree.
- * Any side-effects of live tree state changes are applied here on
- * sucess, like creation/destruction of devices and side-effects
- * like creation of sysfs properties and directories.
- * Returns 0 on success, a negative error value in case of an error.
- * On error the partially applied effects are reverted.
- */
-int of_changeset_apply(struct of_changeset *ocs)
+int __of_changeset_apply(struct of_changeset *ocs)
{
struct of_changeset_entry *ce;
int ret;
@@ -704,17 +694,30 @@ int of_changeset_apply(struct of_changeset *ocs)
}
/**
- * of_changeset_revert - Reverts an applied changeset
+ * of_changeset_apply - Applies a changeset
*
* @ocs: changeset pointer
*
- * Reverts a changeset returning the state of the tree to what it
- * was before the application.
- * Any side-effects like creation/destruction of devices and
- * removal of sysfs properties and directories are applied.
+ * Applies a changeset to the live tree.
+ * Any side-effects of live tree state changes are applied here on
+ * success, like creation/destruction of devices and side-effects
+ * like creation of sysfs properties and directories.
* Returns 0 on success, a negative error value in case of an error.
+ * On error the partially applied effects are reverted.
*/
-int of_changeset_revert(struct of_changeset *ocs)
+int of_changeset_apply(struct of_changeset *ocs)
+{
+ int ret;
+
+ mutex_lock(&of_mutex);
+ ret = __of_changeset_apply(ocs);
+ mutex_unlock(&of_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(of_changeset_apply);
+
+int __of_changeset_revert(struct of_changeset *ocs)
{
struct of_changeset_entry *ce;
int ret;
@@ -742,6 +745,29 @@ int of_changeset_revert(struct of_changeset *ocs)
}
/**
+ * of_changeset_revert - Reverts an applied changeset
+ *
+ * @ocs: changeset pointer
+ *
+ * Reverts a changeset returning the state of the tree to what it
+ * was before the application.
+ * Any side-effects like creation/destruction of devices and
+ * removal of sysfs properties and directories are applied.
+ * Returns 0 on success, a negative error value in case of an error.
+ */
+int of_changeset_revert(struct of_changeset *ocs)
+{
+ int ret;
+
+ mutex_lock(&of_mutex);
+ ret = __of_changeset_revert(ocs);
+ mutex_unlock(&of_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(of_changeset_revert);
+
+/**
* of_changeset_action - Perform a changeset action
*
* @ocs: changeset pointer
@@ -779,3 +805,4 @@ int of_changeset_action(struct of_changeset *ocs, unsigned long action,
list_add_tail(&ce->node, &ocs->entries);
return 0;
}
+EXPORT_SYMBOL_GPL(of_changeset_action);