A call to kobject_init() is required to be paired with a call to
kobject_put() in order to correctly free up the kobject. During cleanup
functions it would be useful to know if a kobject was initialized in
order to correctly pair the call to kobject_put(). For example this is
necessary if we attempt to initialize multiple objects on a list and one
fails - in order to correctly do cleanup we need to know which objects
have been initialized.
Add a predicate kobject_is_initialized() to the kobject API. This
function maintains the kobject layer of abstraction; simply returns
kobj->state_initialized.
Signed-off-by: Tobin C. Harding <tobin@xxxxxxxxxx>
---
include/linux/kobject.h | 2 ++
lib/kobject.c | 12 ++++++++++++
2 files changed, 14 insertions(+)
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index 1ab0d624fb36..65a317b65d9c 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -100,6 +100,8 @@ int kobject_init_and_add(struct kobject *kobj,
struct kobj_type *ktype, struct kobject *parent,
const char *fmt, ...);
+extern bool kobject_is_initialized(struct kobject *kobj);
+
extern void kobject_del(struct kobject *kobj);
extern struct kobject * __must_check kobject_create(void);
diff --git a/lib/kobject.c b/lib/kobject.c
index 0181f102cd1c..ecddf417f452 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -366,6 +366,18 @@ void kobject_init(struct kobject *kobj, struct kobj_type *ktype)
}
EXPORT_SYMBOL(kobject_init);
+/**
+ * kobject_is_initialized() - Kobject initialized predicate.
+ * @kobj: The kobject to query
+ *
+ * Return: True if @kobj has been initialized.
+ */
+bool kobject_is_initialized(struct kobject *kobj)
+{
+ return kobj->state_initialized;
+}
+EXPORT_SYMBOL(kobject_is_initialized);
+
static __printf(3, 0) int kobject_add_varg(struct kobject *kobj,
struct kobject *parent,
const char *fmt, va_list vargs)
--
2.21.0
