From 57f14c05b3cc857af5ccca9af698cfaafb2b831a Mon Sep 17 00:00:00 2001 From: OGAWA Hirofumi Date: Thu, 3 Dec 2009 13:49:43 +0100 Subject: flusher: Fix PF_FROZEN race To touch task->flags directly is racy. thaw_process() still has race (changing non_current->flags, but this is another issue) though, I think it's much better off. So, use thaw_process() instead. Signed-off-by: OGAWA Hirofumi Signed-off-by: Jens Axboe Change-Id: Ifcd4aa521a7bb1f3b263ac4dbb3c483deb935ae8 Reviewed-on: http://git-master/r/2423 Reviewed-by: Gary King Tested-by: Gary King --- mm/backing-dev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'mm') diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 67a33a5a1a93..0e8ca0347707 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -609,7 +609,7 @@ static void bdi_wb_shutdown(struct backing_dev_info *bdi) * it would never exet if it is currently stuck in the refrigerator. */ list_for_each_entry(wb, &bdi->wb_list, list) { - wb->task->flags &= ~PF_FROZEN; + thaw_process(wb->task); kthread_stop(wb->task); } } -- cgit v1.2.3