bdi debugfs dir/file may create fail, add error log here.
Signed-off-by: weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>
---
V1->V2:
fix indentation and make log message more clear
mm/backing-dev.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index b5f940c..0a49665 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -885,7 +885,9 @@ int bdi_register_va(struct backing_dev_info *bdi, const char *fmt, va_list args)
cgwb_bdi_register(bdi);
bdi->dev = dev;
- bdi_debug_register(bdi, dev_name(dev));
+ if (bdi_debug_register(bdi, dev_name(dev)))
+ pr_warn("blkdev %s: creation of bdi debugfs entries failed.\n",
+ dev_name(dev));
set_bit(WB_registered, &bdi->wb.state);
spin_lock_bh(&bdi_lock);
--
2.9.4
