diff --git a/include/linux/sched.h b/include/linux/sched.h
index 9004f6e19eacc462ba719e6bc9a4639bdea16928..6bdaa73ede13abb0f7a8bd11b43776a153874f4e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1105,8 +1105,10 @@ struct task_struct {
 	int exit_code, exit_signal;
 	int pdeath_signal;  /*  The signal sent when the parent dies  */
 	unsigned int jobctl;	/* JOBCTL_*, siglock protected */
-	/* ??? */
+
+	/* Used for emulating ABI behavior of previous Linux versions */
 	unsigned int personality;
+
 	unsigned did_exec:1;
 	unsigned in_execve:1;	/* Tell the LSMs that the process is doing an
 				 * execve */