diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/backing-dev.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 5cb32c5b93d..d3ca0dac111 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -465,6 +465,12 @@ void static bdi_add_default_flusher_task(struct backing_dev_info *bdi) if (!bdi_cap_writeback_dirty(bdi)) return; + if (WARN_ON(!test_bit(BDI_registered, &bdi->state))) { + printk(KERN_ERR "bdi %p/%s is not registered!\n", + bdi, bdi->name); + return; + } + /* * Check with the helper whether to proceed adding a task. Will only * abort if we two or more simultanous calls to @@ -528,6 +534,7 @@ int bdi_register(struct backing_dev_info *bdi, struct device *parent, } bdi_debug_register(bdi, dev_name(dev)); + set_bit(BDI_registered, &bdi->state); exit: return ret; } |