+ unsigned long private;
+};
+
+/**
+ * struct pipe_inode_info - a linux kernel pipe
+ * @wait: reader/writer wait point in case of empty/full pipe
+ * @nrbufs: the number of non-empty pipe buffers in this pipe
+ * @curbuf: the current pipe buffer entry
+ * @tmp_page: cached released page
+ * @readers: number of current readers of this pipe
+ * @writers: number of current writers of this pipe
+ * @waiting_writers: number of writers blocked waiting for room
+ * @r_counter: reader counter
+ * @w_counter: writer counter
+ * @fasync_readers: reader side fasync
+ * @fasync_writers: writer side fasync
+ * @inode: inode this pipe is attached to
+ * @bufs: the circular array of pipe buffers
+ **/
+struct pipe_inode_info {
+ wait_queue_head_t wait;
+ unsigned int nrbufs, curbuf;
+ struct page *tmp_page;
+ unsigned int readers;
+ unsigned int writers;
+ unsigned int waiting_writers;
+ unsigned int r_counter;
+ unsigned int w_counter;
+ struct fasync_struct *fasync_readers;
+ struct fasync_struct *fasync_writers;
+ struct inode *inode;
+ struct pipe_buffer bufs[PIPE_BUFFERS];