86         int tail;  member
100 	if (eerb->head < eerb->tail)  in dasd_eer_get_free_bytes()
101 		return eerb->tail - eerb->head - 1;  in dasd_eer_get_free_bytes()
102 	return eerb->buffersize - eerb->head + eerb->tail -1;  in dasd_eer_get_free_bytes()
112 	if (eerb->head >= eerb->tail)  in dasd_eer_get_filled_bytes()
113 		return eerb->head - eerb->tail;  in dasd_eer_get_filled_bytes()
114 	return eerb->buffersize - eerb->tail + eerb->head;  in dasd_eer_get_filled_bytes()
161  		tailindex = eerb->tail / PAGE_SIZE;  in dasd_eer_read_buffer()
162  		localtail = eerb->tail % PAGE_SIZE;  in dasd_eer_read_buffer()
167 		eerb->tail += len;  in dasd_eer_read_buffer()
168 		if (eerb->tail == eerb->buffersize)  in dasd_eer_read_buffer()
169 			eerb->tail = 0; /* wrap around */  in dasd_eer_read_buffer()
170 		BUG_ON(eerb->tail > eerb->buffersize);  in dasd_eer_read_buffer()
190 			eerb->tail += eerb->residual;  in dasd_eer_start_record()
191 			if (eerb->tail >= eerb->buffersize)  in dasd_eer_start_record()
192 				eerb->tail -= eerb->buffersize;  in dasd_eer_start_record()
197 		eerb->tail += tailcount;  in dasd_eer_start_record()
198 		if (eerb->tail >= eerb->buffersize)  in dasd_eer_start_record()
199 			eerb->tail -= eerb->buffersize;  in dasd_eer_start_record()
633 					eerb->head != eerb->tail);  in dasd_eer_read()
669 	if (eerb->head != eerb->tail)  in dasd_eer_poll()