Merge pull request #385 from arutk/pt_write_double_inv

Two pass write invalidate

src/ocf_request.h

@@ -188,6 +188,9 @@ struct ocf_request {
 	uint8_t seq_cutoff : 1;
 	/*!< Sequential cut off set for this request */
 
+	uint8_t wi_second_pass : 1;
+	/*!< Set after first pass of WI write is completed */
+
 	log_sid_t sid;
 	/*!< Tracing sequence ID */