36 	struct pipe_inode_info *pipe;  in fifo_open()  local
40 	pipe = inode->i_pipe;  in fifo_open()
41 	if (!pipe) {  in fifo_open()
43 		pipe = alloc_pipe_info(inode);  in fifo_open()
44 		if (!pipe)  in fifo_open()
46 		inode->i_pipe = pipe;  in fifo_open()
61 		pipe->r_counter++;  in fifo_open()
62 		if (pipe->readers++ == 0)  in fifo_open()
65 		if (!pipe->writers) {  in fifo_open()
69 				filp->f_version = pipe->w_counter;  in fifo_open()
72 				wait_for_partner(inode, &pipe->w_counter);  in fifo_open()
86 		if ((filp->f_flags & O_NONBLOCK) && !pipe->readers)  in fifo_open()
90 		pipe->w_counter++;  in fifo_open()
91 		if (!pipe->writers++)  in fifo_open()
94 		if (!pipe->readers) {  in fifo_open()
95 			wait_for_partner(inode, &pipe->r_counter);  in fifo_open()
110 		pipe->readers++;  in fifo_open()
111 		pipe->writers++;  in fifo_open()
112 		pipe->r_counter++;  in fifo_open()
113 		pipe->w_counter++;  in fifo_open()
114 		if (pipe->readers == 1 || pipe->writers == 1)  in fifo_open()
128 	if (!--pipe->readers)  in fifo_open()
129 		wake_up_interruptible(&pipe->wait);  in fifo_open()
134 	if (!--pipe->writers)  in fifo_open()
135 		wake_up_interruptible(&pipe->wait);  in fifo_open()
140 	if (!pipe->readers && !pipe->writers)  in fifo_open()