extcon: Add stubs for extcon_register_notifier_all() functions

Add stubs for extcon_register_notifier_all() function for !CONFIG_EXTCON
case.  This is useful for compile testing and for drivers which use
EXTCON but do not require it (therefore do not depend on CONFIG_EXTCON).

Fixes: 815429b39d94 ("extcon: Add new extcon_register_notifier_all() to monitor all external connectors")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index fd183fb..0c19010 100644 (file)
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -271,6 +271,29 @@ static inline  void devm_extcon_unregister_notifier(struct device *dev,
                                struct extcon_dev *edev, unsigned int id,
                                struct notifier_block *nb) { }
 
+static inline int extcon_register_notifier_all(struct extcon_dev *edev,
+                                              struct notifier_block *nb)
+{
+       return 0;
+}
+
+static inline int extcon_unregister_notifier_all(struct extcon_dev *edev,
+                                                struct notifier_block *nb)
+{
+       return 0;
+}
+
+static inline int devm_extcon_register_notifier_all(struct device *dev,
+                                                   struct extcon_dev *edev,
+                                                   struct notifier_block *nb)
+{
+       return 0;
+}
+
+static inline void devm_extcon_unregister_notifier_all(struct device *dev,
+                                                      struct extcon_dev *edev,
+                                                      struct notifier_block *nb) { }
+
 static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
 {
        return ERR_PTR(-ENODEV);