diff --git a/iscsi-scst/kernel/patches/rhel/put_page_callback_addendum-rhel6.patch b/iscsi-scst/kernel/patches/rhel/put_page_callback_addendum-rhel6.patch
new file mode 100644
index 000000000..38a0896ed
--- /dev/null
+++ b/iscsi-scst/kernel/patches/rhel/put_page_callback_addendum-rhel6.patch
@@ -0,0 +1,11 @@
+diff -upkr linux-2.6.32.x86_64/include/linux/Kbuild linux-2.6.32.x86_64/include/linux/Kbuild
+--- linux-2.6.32.x86_64/include/linux/Kbuild    2009-12-03 04:51:21.000000000 +0100
++++ linux-2.6.32.x86_64/include/linux/Kbuild    2010-08-27 13:14:53.767830262 +0200
+@@ -112,6 +112,7 @@ header-y += map_to_7segment.h
+ header-y += matroxfb.h
+ header-y += meye.h
+ header-y += minix_fs.h
++header-y += mm.h
+ header-y += mmtimer.h
+ header-y += mqueue.h
+ header-y += mtio.h
diff --git a/scst/src/scst_pres.c b/scst/src/scst_pres.c
index 0ca4c92ba..689ffa691 100644
--- a/scst/src/scst_pres.c
+++ b/scst/src/scst_pres.c
@@ -928,28 +928,32 @@ static void scst_pr_remove_device_files(struct scst_tgt_dev *tgt_dev)
 	set_fs(KERNEL_DS);
 
 #if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 39)
-	res = path_lookup(dev->pr_file_name, 0, &nd);
+	res = dev->pr_file_name ? path_lookup(dev->pr_file_name, 0, &nd) :
+		-ENOENT;
 	if (!res)
 		scst_pr_vfs_unlink_and_put(&nd);
 	else
 		TRACE_DBG("Unable to lookup file '%s' - error %d",
 			dev->pr_file_name, res);
 
-	res = path_lookup(dev->pr_file_name1, 0, &nd);
+	res = dev->pr_file_name1 ? path_lookup(dev->pr_file_name1, 0, &nd) :
+		-ENOENT;
 	if (!res)
 		scst_pr_vfs_unlink_and_put(&nd);
 	else
 		TRACE_DBG("Unable to lookup file '%s' - error %d",
 			dev->pr_file_name1, res);
 #else
-	res = kern_path(dev->pr_file_name, 0, &path);
+	res = dev->pr_file_name ? kern_path(dev->pr_file_name, 0, &path) :
+		-ENOENT;
 	if (!res)
 		scst_pr_vfs_unlink_and_put(&path);
 	else
 		TRACE_DBG("Unable to lookup file '%s' - error %d",
 			dev->pr_file_name, res);
 
-	res = kern_path(dev->pr_file_name1, 0, &path);
+	res = dev->pr_file_name1 ? kern_path(dev->pr_file_name1, 0, &path) :
+		-ENOENT;
 	if (!res)
 		scst_pr_vfs_unlink_and_put(&path);
 	else