block: fix a build error

The code is only for blkcg not for all cgroups

Fixes: d4478e92d618 ("block/loop: make loop cgroup aware")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index fd4eff5f5b76..bc8e61506968 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1692,7 +1692,7 @@ static blk_status_t loop_queue_rq(struct blk_mq_hw_ctx *hctx,
         }
 
         /* always use the first bio's css */
-#ifdef CONFIG_CGROUPS
+#ifdef CONFIG_BLK_CGROUP
         if (cmd->use_aio && cmd->rq->bio && cmd->rq->bio->bi_css) {
                 cmd->css = cmd->rq->bio->bi_css;
                 css_get(cmd->css);