Allow lockdep to track the dm-snap bit spin locks. Signed-off-by: Matthew Wilcox (Oracle) <wi...@infradead.org> --- drivers/md/dm-snap.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 8f3ad87e6117..4c2a01e433de 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -644,16 +644,18 @@ static void dm_exception_table_lock_init(struct dm_snapshot *s, chunk_t chunk, lock->pending_slot = &pending->table[exception_hash(pending, chunk)]; } +static DEFINE_SPLIT_LOCK(dm_exception_lock); + static void dm_exception_table_lock(struct dm_exception_table_lock *lock) { - hlist_bl_lock(lock->complete_slot); - hlist_bl_lock(lock->pending_slot); + hlist_bl_lock(lock->complete_slot, &dm_exception_lock); + hlist_bl_lock_nested(lock->pending_slot, &dm_exception_lock, 1); } static void dm_exception_table_unlock(struct dm_exception_table_lock *lock) { - hlist_bl_unlock(lock->pending_slot); - hlist_bl_unlock(lock->complete_slot); + hlist_bl_unlock(lock->pending_slot, &dm_exception_lock); + hlist_bl_unlock(lock->complete_slot, &dm_exception_lock); } static int dm_exception_table_init(struct dm_exception_table *et, -- 2.30.2