From 6cee41f0519664cf1fb0c25cd32df416ae54d099 Mon Sep 17 00:00:00 2001 From: Alasdair Kergon Date: Sat, 5 Jan 2002 21:51:25 +0000 Subject: [PATCH] Add a lock. --- kernel/common/dm.c.in | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/common/dm.c.in b/kernel/common/dm.c.in index 25cb883..2884af4 100644 --- a/kernel/common/dm.c.in +++ b/kernel/common/dm.c.in @@ -785,10 +785,14 @@ int dm_destroy(struct mapped_device *md) */ void dm_set_ro(struct mapped_device *md, int ro) { + dm_lock_w(); + if (md->read_only != ro) { md->read_only = ro; set_device_ro(md->dev, ro); } + + dm_unlock_w(); } /* -- 2.43.5