drivers/md/dm-bufio.c

339 	atomic_t hold_count;
611 	atomic_inc(&b->hold_count);
641 	BUG_ON(!atomic_read(&b->hold_count));
642 	r = atomic_dec_and_test(&b->hold_count);
655  * predicate the hold_count of the selected buffer will be zero.
665  * extra test for hold_count.
674 	if (atomic_read(&b->hold_count))
859 	BUG_ON(atomic_read(&b->hold_count) != 1);
872  * Fails if the hold_count is not one (ie. the caller holds the only reference).
882 	if (atomic_read(&b->hold_count) != 1) {
938 		if (atomic_read(&b->hold_count))
1489 	BUG_ON(atomic_read(&b->hold_count));
1790 	atomic_set(&b->hold_count, 1);
1902 	if (b && (atomic_read(&b->hold_count) == 1))
2339 	      (unsigned long long)b->block, atomic_read(&b->hold_count), b->list_mode);
2343 	atomic_set(&b->hold_count, 0);