+ssize_t vfs_lib_ring_buffer_file_splice_read(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len, unsigned int flags);
+loff_t vfs_lib_ring_buffer_no_llseek(struct file *file, loff_t offset,
+ int origin);
+int vfs_lib_ring_buffer_mmap(struct file *filp, struct vm_area_struct *vma);
+ssize_t vfs_lib_ring_buffer_splice_read(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len,
+ unsigned int flags);
+