X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=mm%2Fbacking-dev.c;h=67a33a5a1a93846bda0ce57ee37fe8d39486f60a;hb=cd79bf7b1c061752dbee723bccf60c85d6c2d45d;hp=11aee09dd2a611ea7529d4f1b863d383d533b7b7;hpb=931ed94430e36b9bea3904572424116092ba5663;p=karo-tx-linux.git

diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 11aee09dd2a6..67a33a5a1a93 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -604,10 +604,14 @@ static void bdi_wb_shutdown(struct backing_dev_info *bdi)
 
 	/*
 	 * Finally, kill the kernel threads. We don't need to be RCU
-	 * safe anymore, since the bdi is gone from visibility.
+	 * safe anymore, since the bdi is gone from visibility. Force
+	 * unfreeze of the thread before calling kthread_stop(), otherwise
+	 * it would never exet if it is currently stuck in the refrigerator.
 	 */
-	list_for_each_entry(wb, &bdi->wb_list, list)
+	list_for_each_entry(wb, &bdi->wb_list, list) {
+		wb->task->flags &= ~PF_FROZEN;
 		kthread_stop(wb->task);
+	}
 }
 
 /*