On Fri, May 14, 2021 at 03:18:41PM +0200, Christoph Hellwig wrote: > As an artifact of how gendisk lookup used to work in earlier kernels, > GENHD_FL_UP is only cleared very late in del_gendisk, and a global lock > is used to prevent opens from succeeding while del_gendisk is tearing > down the gendisk. Switch to clearing the flag early and under bd_mutex > so that callers can use bd_mutex to stabilize the flag, which removes > the need for the global mutex. > > Signed-off-by: Christoph Hellwig <hch@xxxxxx> Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx> -- Ming
