diff --git a/mm/fremap.c b/mm/fremap.c
index 2c5646f..72b8fa3 100644
--- a/mm/fremap.c
+++ b/mm/fremap.c
@@ -149,6 +149,10 @@
 	int has_write_lock = 0;
 	vm_flags_t vm_flags = 0;
 
+	pr_warn_once("%s (%d) uses deprecated remap_file_pages() syscall. "
+			"See Documentation/vm/remap_file_pages.txt.\n",
+			current->comm, current->pid);
+
 	if (prot)
 		return err;
 	/*