2018-01-11 0:10 GMT+08:00 Bart Van Assche <Bart.VanAssche@xxxxxxx>:
> On Wed, 2018-01-10 at 23:18 +0800, weiping zhang wrote:
>> bdi debugfs dir/file may create fail, add error log here.
>>
>> Signed-off-by: weiping zhang <zhangweiping@xxxxxxxxxxxxxxx>
>> ---
>> mm/backing-dev.c | 3 ++-
>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/mm/backing-dev.c b/mm/backing-dev.c
>> index b5f940c..9117c21 100644
>> --- a/mm/backing-dev.c
>> +++ b/mm/backing-dev.c
>> @@ -885,7 +885,8 @@ 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 create bdi debugfs failed\n", dev_name(dev));
>> set_bit(WB_registered, &bdi->wb.state);
>>
>> spin_lock_bh(&bdi_lock);
>
> The indentation of the if-statement is inconsistent. Have you verified this
> patch with checkpatch before submitting it?
>
> Additionally, the error message is hard to understand. Please make it more clear,
> e.g. as follows: "%s: creation of bdi debugfs entries failed.\n".
>
OK, fix them at V2, thanks a lot
> Thanks,
>
> Bart.
