NFSD: Using path_get when assigning path for export

Signed-off-by: Kinglong Mee <kinglongmee@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 13b85f9..ef2d9d6 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -698,8 +698,8 @@
 
 	kref_get(&item->ex_client->ref);
 	new->ex_client = item->ex_client;
-	new->ex_path.dentry = dget(item->ex_path.dentry);
-	new->ex_path.mnt = mntget(item->ex_path.mnt);
+	new->ex_path = item->ex_path;
+	path_get(&item->ex_path);
 	new->ex_fslocs.locations = NULL;
 	new->ex_fslocs.locations_count = 0;
 	new->ex_fslocs.migrated = 0;