headers/uninline: Uninline single-use function: kobject_has_children()

This was the only usage of <linux/kref_api.h> in <linux/kobject_api.h>,
so we'll able to decouple the two after this change.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 60d703ebd123..603941b00988 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -3028,6 +3028,23 @@ static inline struct kobject *get_glue_dir(struct device *dev)
 	return dev->kobj.parent;
 }
 
+/**
+ * kobject_has_children - Returns whether a kobject has children.
+ * @kobj: the object to test
+ *
+ * This will return whether a kobject has other kobjects as children.
+ *
+ * It does NOT account for the presence of attribute files, only sub
+ * directories. It also assumes there is no concurrent addition or
+ * removal of such children, and thus relies on external locking.
+ */
+static inline bool kobject_has_children(struct kobject *kobj)
+{
+	WARN_ON_ONCE(kref_read(&kobj->kref) == 0);
+
+	return kobj->sd && kobj->sd->dir.subdirs;
+}
+
 /*
  * make sure cleaning up dir as the last step, we need to make
  * sure .release handler of kobject is run with holding the