Commit b194679f authored Apr 27, 2017 by Bart Van Assche Committed by Mike Snitzer Apr 27, 2017

dm mpath: verify __pg_init_all_paths locking assumptions at runtime



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@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

parent 1ea0654e

drivers/md/dm-mpath.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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;