static inline void drm_hotplug(void) {}
-static inline void class_simple_set_hotplug(struct class_simple *cs, void (*fn)(void));
+static inline void class_simple_set_hotplug(struct class_simple *cs, void (*fn)(void)) {}
#ifndef pci_pretty_name
#define pci_pretty_name(x) x->name
static inline void drm_hotplug(void) {}
-static inline void class_simple_set_hotplug(struct class_simple *cs, void (*fn)(void));
+static inline void class_simple_set_hotplug(struct class_simple *cs, void (*fn)(void)) {}
#ifndef pci_pretty_name
#define pci_pretty_name(x) x->name