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-rw-r--r--fs/fs-writeback.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 2e601ce581c..da86ef58e42 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1046,6 +1046,14 @@ void __mark_inode_dirty(struct inode *inode, int flags)
*/
if (!was_dirty) {
struct bdi_writeback *wb = &inode_to_bdi(inode)->wb;
+ struct backing_dev_info *bdi = wb->bdi;
+
+ if (bdi_cap_writeback_dirty(bdi) &&
+ !test_bit(BDI_registered, &bdi->state)) {
+ WARN_ON(1);
+ printk(KERN_ERR "bdi-%s not registered\n",
+ bdi->name);
+ }
inode->dirtied_when = jiffies;
list_move(&inode->i_list, &wb->b_dirty);