sbitmap: warn if using smaller shallow depth than was setup

Make sure the user passed the right value to sbitmap_queue_min_shallow_depth(). Acked-by: Paolo Valente <[email protected]> Signed-off-by: Omar Sandoval <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
thomasl · May 10, 2018 · 61445b5 · 61445b5
1 parent 2882064
commit 61445b5
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/lib/sbitmap.c b/lib/sbitmap.c
@@ -402,6 +402,8 @@ int __sbitmap_queue_get_shallow(struct sbitmap_queue *sbq,
 	unsigned int hint, depth;
 	int nr;
 
+	WARN_ON_ONCE(shallow_depth < sbq->min_shallow_depth);
+
 	hint = this_cpu_read(*sbq->alloc_hint);
 	depth = READ_ONCE(sbq->sb.depth);
 	if (unlikely(hint >= depth)) {