Use MAP_PRIVATE instead of MAP_SHARED for textfile_put()
diff --git a/common/textfile.c b/common/textfile.c
index 906c230..ec445b1 100644
--- a/common/textfile.c
+++ b/common/textfile.c
@@ -148,7 +148,7 @@
 		goto unlock;
 	}
 
-	map = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_LOCKED, fd, 0);
+	map = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_LOCKED, fd, 0);
 	if (!map || map == MAP_FAILED) {
 		err = errno;
 		goto unlock;