Ensure it is clear which lock is required on do_blk_trace_setup(). Suggested-by: Bart Van Assche <bvanassche@xxxxxxx> Signed-off-by: Luis Chamberlain <mcgrof@xxxxxxxxxx> --- kernel/trace/blktrace.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c index 7f60029bdaff..7ff2ea5cd05e 100644 --- a/kernel/trace/blktrace.c +++ b/kernel/trace/blktrace.c @@ -483,6 +483,8 @@ static int do_blk_trace_setup(struct request_queue *q, char *name, dev_t dev, struct dentry *dir = NULL; int ret; + lockdep_assert_held(&q->blk_trace_mutex); + if (!buts->buf_size || !buts->buf_nr) return -EINVAL; -- 2.26.2
