Module Name: src
Committed By: tkusumi
Date: Mon Dec 2 15:17:43 UTC 2019
Modified Files:
src/sys/dev/dm: device-mapper.c
Log Message:
dm: Add a comment on race window on unload
There is a minor race window on unload vs device creation
that can cause panic.
https://github.com/DragonFlyBSD/DragonFlyBSD/commit/53a07f3ae7313aa58948a60f46428bfc2254dc3c
taken-from: DragonFlyBSD
To generate a diff of this commit:
cvs rdiff -u -r1.40 -r1.41 src/sys/dev/dm/device-mapper.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/dm/device-mapper.c
diff -u src/sys/dev/dm/device-mapper.c:1.40 src/sys/dev/dm/device-mapper.c:1.41
--- src/sys/dev/dm/device-mapper.c:1.40 Sat Oct 6 14:59:11 2018
+++ src/sys/dev/dm/device-mapper.c Mon Dec 2 15:17:43 2019
@@ -1,4 +1,4 @@
-/* $NetBSD: device-mapper.c,v 1.40 2018/10/06 14:59:11 mlelstv Exp $ */
+/* $NetBSD: device-mapper.c,v 1.41 2019/12/02 15:17:43 tkusumi Exp $ */
/*
* Copyright (c) 2010 The NetBSD Foundation, Inc.
@@ -197,6 +197,7 @@ dm_modcmd(modcmd_t cmd, void *arg)
*/
if (dm_dev_counter > 0)
return EBUSY;
+ /* race window here */
error = dmdestroy();
if (error)
