/* Drop the inode semaphore and wait for a pipe event, atomically */
void pipe_wait(struct pipe_inode_info *pipe);
-struct pipe_inode_info * alloc_pipe_info(struct inode * inode);
+struct pipe_inode_info *alloc_pipe_info(void);
void free_pipe_info(struct inode * inode);
void __free_pipe_info(struct pipe_inode_info *);