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path: root/drivers/block/ll_rw_blk.c
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Diffstat (limited to 'drivers/block/ll_rw_blk.c')
-rw-r--r--drivers/block/ll_rw_blk.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/block/ll_rw_blk.c b/drivers/block/ll_rw_blk.c
index 46e54b44166..11ef9d9ea13 100644
--- a/drivers/block/ll_rw_blk.c
+++ b/drivers/block/ll_rw_blk.c
@@ -1715,6 +1715,15 @@ request_queue_t *blk_init_queue(request_fn_proc *rfn, spinlock_t *lock)
if (blk_init_free_list(q))
goto out_init;
+ /*
+ * if caller didn't supply a lock, they get per-queue locking with
+ * our embedded lock
+ */
+ if (!lock) {
+ spin_lock_init(&q->__queue_lock);
+ lock = &q->__queue_lock;
+ }
+
q->request_fn = rfn;
q->back_merge_fn = ll_back_merge_fn;
q->front_merge_fn = ll_front_merge_fn;