diff -ur lin_tape-3.0.8.orig/lower.c lin_tape-3.0.8/lower.c
--- lin_tape-3.0.8.orig/lower.c	2016-03-15 23:39:12.000000000 +0100
+++ lin_tape-3.0.8/lower.c	2016-06-19 13:16:12.828653141 +0200
@@ -471,6 +471,21 @@
 		} else if (pfo_cmd->source == PFO_SOURCE_SG ||
 			   pfo_cmd->source == PFO_SOURCE_IOCTL) {
 			if (pfo_cmd->iov_count) {
+#if LINUX_VERSION_CODE > KERNEL_VERSION(3,19,0)
+				struct iovec *iov = NULL;
+				struct iov_iter i;
+				err = import_iovec(write, pfo_cmd->buffer, pfo_cmd->iov_count, 0, &iov, &i);
+				if (err < 0)
+					return err;
+				iov_iter_truncate(&i, pfo_cmd->bufflen);
+				
+				err = blk_rq_map_user_iov(sdev->request_queue,
+					rq,
+					pfo_cmd->mdata,
+					&i,
+					GFP_ATOMIC);
+				kfree(iov);
+#else
 				err = blk_rq_map_user_iov(sdev->request_queue,
 					rq,
 					pfo_cmd->mdata,
@@ -478,6 +493,7 @@
 					pfo_cmd->iov_count,
 					pfo_cmd->bufflen,
 					GFP_KERNEL);
+#endif
 			} else {
 				err = blk_rq_map_user(sdev->request_queue,
 					rq,
diff -ur lin_tape-3.0.8.orig/sgmp.c lin_tape-3.0.8/sgmp.c
--- lin_tape-3.0.8.orig/sgmp.c	2016-06-19 13:15:52.000000000 +0200
+++ lin_tape-3.0.8/sgmp.c	2016-06-19 13:16:12.828653141 +0200
@@ -77,6 +77,7 @@
 #else
 #include <linux/smp_lock.h>
 #endif
+#include <linux/uio.h>
 
 #include "scsi.h"
 #include <scsi/scsi_dbg.h>
@@ -2029,7 +2029,12 @@
 	}
 
 	if (iov_count) {
+#if LINUX_VERSION_CODE > KERNEL_VERSION(3,19,0)
+		int size = sizeof(struct iovec) * iov_count;
+		struct iov_iter i;
+#else
 		int len, size = sizeof(struct sg_iovec) * iov_count;
+#endif
 		struct iovec *iov;
 #if LINUX_VERSION_CODE > KERNEL_VERSION(2,6,32)
 		iov = memdup_user(hp->dxferp, size);
@@ -2046,6 +2051,13 @@
 		}
 #endif
 
+#if LINUX_VERSION_CODE > KERNEL_VERSION(3,19,0)
+		iov_iter_init(&i, rw, iov, iov_count,
+			      min_t(size_t, hp->dxfer_len,
+				    iov_length(iov, iov_count)));
+
+		res = blk_rq_map_user_iov(q, rq, md, &i, GFP_ATOMIC);
+#else
 		len = iov_length(iov, iov_count);
 		if (hp->dxfer_len < len) {
 			iov_count = iov_shorten(iov, iov_count, hp->dxfer_len);
@@ -2055,6 +2067,7 @@
 		res = blk_rq_map_user_iov(q, rq, md, (struct sg_iovec *)iov,
 					  iov_count,
 					  len, GFP_ATOMIC);
+#endif
 		kfree(iov);
 	} else
 		res = blk_rq_map_user(q, rq, md, hp->dxferp,