extern int phys_mapping(unsigned long phys, __u64 *offset_out);
extern int physmem_subst_mapping(void *virt, int fd, __u64 offset, int w);
-extern int is_remapped(const void *virt, int fd, __u64 offset);
+extern int is_remapped(void *virt);
extern int physmem_remove_mapping(void *virt);
extern void physmem_forget_descriptor(int fd);