Module Name: src
Committed By: riastradh
Date: Mon Oct 3 19:57:41 UTC 2022
Modified Files:
src/sys/dev/ic: com.c
Log Message:
com(4): Comment on lock order.
To generate a diff of this commit:
cvs rdiff -u -r1.374 -r1.375 src/sys/dev/ic/com.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/ic/com.c
diff -u src/sys/dev/ic/com.c:1.374 src/sys/dev/ic/com.c:1.375
--- src/sys/dev/ic/com.c:1.374 Mon Oct 3 19:26:35 2022
+++ src/sys/dev/ic/com.c Mon Oct 3 19:57:41 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: com.c,v 1.374 2022/10/03 19:26:35 riastradh Exp $ */
+/* $NetBSD: com.c,v 1.375 2022/10/03 19:57:41 riastradh Exp $ */
/*-
* Copyright (c) 1998, 1999, 2004, 2008 The NetBSD Foundation, Inc.
@@ -63,10 +63,14 @@
/*
* COM driver, uses National Semiconductor NS16450/NS16550AF UART
* Supports automatic hardware flow control on StarTech ST16C650A UART
+ *
+ * Lock order:
+ * tty_lock (IPL_VM)
+ * -> sc->sc_lock (IPL_HIGH)
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.374 2022/10/03 19:26:35 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: com.c,v 1.375 2022/10/03 19:57:41 riastradh Exp $");
#include "opt_com.h"
#include "opt_ddb.h"
