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-rw-r--r--mm/backing-dev.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index eaa4a5bbe06..65d420499a6 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -30,6 +30,7 @@ EXPORT_SYMBOL_GPL(default_backing_dev_info);
30 30
31struct backing_dev_info noop_backing_dev_info = { 31struct backing_dev_info noop_backing_dev_info = {
32 .name = "noop", 32 .name = "noop",
33 .capabilities = BDI_CAP_NO_ACCT_AND_WRITEBACK,
33}; 34};
34EXPORT_SYMBOL_GPL(noop_backing_dev_info); 35EXPORT_SYMBOL_GPL(noop_backing_dev_info);
35 36
@@ -243,6 +244,7 @@ static int __init default_bdi_init(void)
243 err = bdi_init(&default_backing_dev_info); 244 err = bdi_init(&default_backing_dev_info);
244 if (!err) 245 if (!err)
245 bdi_register(&default_backing_dev_info, NULL, "default"); 246 bdi_register(&default_backing_dev_info, NULL, "default");
247 err = bdi_init(&noop_backing_dev_info);
246 248
247 return err; 249 return err;
248} 250}
@@ -445,8 +447,8 @@ static int bdi_forker_thread(void *ptr)
445 switch (action) { 447 switch (action) {
446 case FORK_THREAD: 448 case FORK_THREAD:
447 __set_current_state(TASK_RUNNING); 449 __set_current_state(TASK_RUNNING);
448 task = kthread_run(bdi_writeback_thread, &bdi->wb, "flush-%s", 450 task = kthread_create(bdi_writeback_thread, &bdi->wb,
449 dev_name(bdi->dev)); 451 "flush-%s", dev_name(bdi->dev));
450 if (IS_ERR(task)) { 452 if (IS_ERR(task)) {
451 /* 453 /*
452 * If thread creation fails, force writeout of 454 * If thread creation fails, force writeout of
@@ -457,10 +459,13 @@ static int bdi_forker_thread(void *ptr)
457 /* 459 /*
458 * The spinlock makes sure we do not lose 460 * The spinlock makes sure we do not lose
459 * wake-ups when racing with 'bdi_queue_work()'. 461 * wake-ups when racing with 'bdi_queue_work()'.
462 * And as soon as the bdi thread is visible, we
463 * can start it.
460 */ 464 */
461 spin_lock_bh(&bdi->wb_lock); 465 spin_lock_bh(&bdi->wb_lock);
462 bdi->wb.task = task; 466 bdi->wb.task = task;
463 spin_unlock_bh(&bdi->wb_lock); 467 spin_unlock_bh(&bdi->wb_lock);
468 wake_up_process(task);
464 } 469 }
465 break; 470 break;
466 471