Prepare to reintroduce tg_drain_bios(), which will iterate until throtl_rb_first() return NULL. Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx> --- block/blk-throttle.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 39bb6e68a9a2..fdd57878e862 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -502,7 +502,6 @@ throtl_rb_first(struct throtl_service_queue *parent_sq) struct rb_node *n; n = rb_first_cached(&parent_sq->pending_tree); - WARN_ON_ONCE(!n); if (!n) return NULL; return rb_entry_tg(n); @@ -521,7 +520,7 @@ static void update_min_dispatch_time(struct throtl_service_queue *parent_sq) struct throtl_grp *tg; tg = throtl_rb_first(parent_sq); - if (!tg) + if (WARN_ON_ONCE(!tg)) return; parent_sq->first_pending_disptime = tg->disptime; @@ -1090,7 +1089,7 @@ static int throtl_select_dispatch(struct throtl_service_queue *parent_sq) break; tg = throtl_rb_first(parent_sq); - if (!tg) + if (WARN_ON_ONCE(!tg)) break; if (time_before(jiffies, tg->disptime)) -- 2.31.1
