[dm-devel] [PATCH 09/13] dm-mpath: Verify locking assumptions at runtime
Bart Van Assche
bart.vanassche at sandisk.com
Wed Apr 26 18:37:24 UTC 2017
Verify at runtime that __pg_init_all_paths() is called with
multipath.lock held if lockdep is enabled.
Signed-off-by: Bart Van Assche <bart.vanassche at sandisk.com>
Cc: Hannes Reinecke <hare at suse.com>
---
drivers/md/dm-mpath.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index fb4b7228fe5f..312d4fc34430 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -298,6 +298,8 @@ static int __pg_init_all_paths(struct multipath *m)
struct pgpath *pgpath;
unsigned long pg_init_delay = 0;
+ lockdep_assert_held(&m->lock);
+
if (atomic_read(&m->pg_init_in_progress) || test_bit(MPATHF_PG_INIT_DISABLED, &m->flags))
return 0;
--
2.12.2
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