[PATCH] kobject: introduce kobject_del_and_put()

Yangtao Li
2023-03-18T20:22:19Z

There are plenty of using kobject_del() and kobject_put() together
in the kernel tree. This patch wraps these two calls in a single helper.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
include/linux/kobject.h | 1 +
lib/kobject.c | 17 +++++++++++++++--
2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index bdab370a24f4..782d4bd119f8 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -111,6 +111,7 @@ extern struct kobject *kobject_get(struct kobject *kobj);
extern struct kobject * __must_check kobject_get_unless_zero(
struct kobject *kobj);
extern void kobject_put(struct kobject *kobj);
+extern void kobject_del_and_put(struct kobject *kobj);

extern const void *kobject_namespace(const struct kobject *kobj);
extern void kobject_get_ownership(const struct kobject *kobj,
diff --git a/lib/kobject.c b/lib/kobject.c
index 6e2f0bee3560..8c0293e37214 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -731,6 +731,20 @@ void kobject_put(struct kobject *kobj)
}
EXPORT_SYMBOL(kobject_put);

+/**
+ * kobject_del_and_put() - Delete kobject.
+ * @kobj: object.
+ *
+ * Unlink kobject from hierarchy and decrement the refcount.
+ * If refcount is 0, call kobject_cleanup().
+ */
+void kobject_del_and_put(struct kobject *kobj)
+{
+ kobject_del(kobj);
+ kobject_put(kobj);
+}
+EXPORT_SYMBOL_GPL(kobject_del_and_put);
+
static void dynamic_kobj_release(struct kobject *kobj)
{
pr_debug("kobject: (%p): %s\n", kobj, __func__);
@@ -874,8 +888,7 @@ void kset_unregister(struct kset *k)
{
if (!k)
return;
- kobject_del(&k->kobj);
- kobject_put(&k->kobj);
+ kobject_del_and_put(&k->kobj);
}
EXPORT_SYMBOL(kset_unregister);

--
2.35.1