Warn when the last reference on a live disk is put without calling del_gendisk first. There are some BDI related bug reports that look like a case of this, so make sure we have the proper instrumentation to catch it. Signed-off-by: Christoph Hellwig <hch@xxxxxx> --- block/genhd.c | 1 + 1 file changed, 1 insertion(+) diff --git a/block/genhd.c b/block/genhd.c index 5e8aa0ab66c2a..dd7e949f876ed 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -1057,6 +1057,7 @@ static void disk_release(struct device *dev) struct gendisk *disk = dev_to_disk(dev); might_sleep(); + WARN_ON_ONCE(disk_live(disk)); disk_release_events(disk); kfree(disk->random); -- 2.30.2
