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authorOmar Sandoval <osandov@fb.com>2018-05-09 17:29:24 -0700
committerJens Axboe <axboe@kernel.dk>2018-05-10 11:27:52 -0600
commit61445b56d031bc12feafb477848cf4ef9a725fc9 (patch)
treef4e6aef2571f9566c287342f4fe0fc9fa37c3a61
parent2882064076c80ed643fe9c78ed7d493446bc5e0d (diff)
downloadlinux-61445b56d031bc12feafb477848cf4ef9a725fc9.tar.bz2
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>
-rw-r--r--lib/sbitmap.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/sbitmap.c b/lib/sbitmap.c
index d21473b42465..8f0950fbaa5c 100644
--- 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)) {