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Commit 5a8f1f80 authored by Bart Van Assche's avatar Bart Van Assche Committed by Mike Snitzer
Browse files

dm: add two lockdep_assert_held() statements 



Document the locking assumptions for the __bind() and __dm_suspend()
functions.

Signed-off-by: default avatarBart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent c533f249

drivers/md/dm.c

+4 −0
Original line number Diff line number Diff line
@@ -1648,6 +1648,8 @@ static struct dm_table *__bind(struct mapped_device *md, struct dm_table *t, 
	struct request_queue *q = md->queue;

	sector_t size;



	lockdep_assert_held(&md->suspend_lock);



	size = dm_table_get_size(t);



	/*
@@ -2094,6 +2096,8 @@ static int __dm_suspend(struct mapped_device *md, struct dm_table *map, 
	bool noflush = suspend_flags & DM_SUSPEND_NOFLUSH_FLAG;

	int r;



	lockdep_assert_held(&md->suspend_lock);



	/*

	 * DMF_NOFLUSH_SUSPENDING must be set before presuspend.

	 * This flag is cleared before dm_suspend returns.