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 <paolo.valente@linaro.org>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/lib/sbitmap.c b/lib/sbitmap.c
index d21473b..8f0950f 100644
--- a/lib/sbitmap.c
+++ b/lib/sbitmap.c
@@ -402,6 +402,8 @@
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)) {