Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> writes:
> On Mon, 24 Oct 2022 12:05:50 -0700 Stefan Roesch <shr@xxxxxxxxxxxx> wrote:
>
>> This adds the bdi_set_strict_limit function to be able to set/unset the
>> BDI_CAP_STRICTLIMIT flag.
>>
>> ...
>>
>> --- a/mm/page-writeback.c
>> +++ b/mm/page-writeback.c
>> @@ -698,6 +698,22 @@ int bdi_set_max_ratio(struct backing_dev_info *bdi, unsigned max_ratio)
>> }
>> EXPORT_SYMBOL(bdi_set_max_ratio);
>>
>> +int bdi_set_strict_limit(struct backing_dev_info *bdi, unsigned int strict_limit)
>> +{
>> + if (strict_limit > 1)
>> + return -EINVAL;
>> +
>> + spin_lock_bh(&bdi_lock);
>> + if (strict_limit)
>> + bdi->capabilities |= BDI_CAP_STRICTLIMIT;
>> + else
>> + bdi->capabilities &= ~BDI_CAP_STRICTLIMIT;
>> + spin_unlock_bh(&bdi_lock);
>> +
>> + return 0;
>> +}
>> +EXPORT_SYMBOL_GPL(bdi_set_strict_limit);
>
> I don't believe the export is needed?
No, the export is not needed, the next version will remove the export.
