diff options
| -rw-r--r-- | mm/page-writeback.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 0a931cdd4f6b..902e5f215e57 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -1965,10 +1965,12 @@ void laptop_mode_timer_fn(unsigned long data) if (!bdi_has_dirty_io(&q->backing_dev_info)) return; + rcu_read_lock(); bdi_for_each_wb(wb, &q->backing_dev_info, &iter, 0) if (wb_has_dirty_io(wb)) wb_start_writeback(wb, nr_pages, true, WB_REASON_LAPTOP_TIMER); + rcu_read_unlock(); } /* |