On Mon, 26 Sep 2022 13:24:55 +0200 Oleksij Rempel wrote: > +static inline int pse_controller_register(struct pse_controller_dev *pcdev) > +{ > + return -ENOTSUPP; > +} > + > +static inline void pse_controller_unregister(struct pse_controller_dev *pcdev) > +{ > +} > + > +static inline int devm_pse_controller_register(struct device *dev, > + struct pse_controller_dev *pcdev) > +{ > + return -ENOTSUPP; > +} Presumably only PSE controller drivers would try to register themselves. Such drivers should depend on the right config, and therefore we don't need static inline stubs for the register/unregister API. > +static inline struct pse_control *pse_control_get(struct device *dev) > +{ > + return ERR_PTR(-ENOTSUPP); > +} > + > +static inline struct pse_control *devm_pse_control_get( struct device *dev) nit: extra space after ( > +{ > + return ERR_PTR(-ENOTSUPP); > +} These two I don't see any calls to outside drivers/net/pse-pd/pse_core.c so they should go from the API until we get an in-tree caller. > +static inline struct pse_control *of_pse_control_get(struct device_node *node) > +{ > + return ERR_PTR(-ENOTSUPP); > +} This one should prolly return -ENOENT as noted on patch 4. If you could sed -i 's/ENOTSUPP/EOPNOTSUPP/' on the patches that'd be great, I don't think those errno can leak to user space but why risk it...