[PATCH 01/21] driver core: add local subsys_get and subsys_put functions

Greg Kroah-Hartman
2023-02-08T11:14:35Z

We need to control the reference count of the subsys private structure
instead of directly manipulating the kset reference count of it, so wrap
that logic up in a subsys_get() and subsys_put() function to make it more
obvious as to what is happening.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/base/base.h | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/base/base.h b/drivers/base/base.h
index 0e806f641079..9e06c18c7a64 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -57,6 +57,19 @@ struct subsys_private {
};
#define to_subsys_private(obj) container_of_const(obj, struct subsys_private, subsys.kobj)

+static inline struct subsys_private *subsys_get(struct subsys_private *sp)
+{
+ if (sp)
+ kset_get(&sp->subsys);
+ return sp;
+}
+
+static inline void subsys_put(struct subsys_private *sp)
+{
+ if (sp)
+ kset_put(&sp->subsys);
+}
+
struct driver_private {
struct kobject kobj;
struct klist klist_devices;
--
2.39.1