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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>
This commit is contained in:
Omar Sandoval 2018-05-09 17:29:24 -07:00 committed by Jens Axboe
parent 2882064076
commit 61445b56d0
1 changed files with 2 additions and 0 deletions
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lib/sbitmap.c
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@ -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)) {