Re: [PATCH 13/17] md: raid1: use bio_segments_all()

[Ming Lei]

On Thu, Feb 16, 2017 at 8:35 PM, Johannes Thumshirn <jthumshirn@xxxxxxx> wrote:
> On 02/16/2017 12:45 PM, Ming Lei wrote:
>> @@ -998,7 +998,8 @@ static void alloc_behind_pages(struct bio *bio, struct r1bio *r1_bio)
>>  {
>>       int i;
>>       struct bio_vec *bvec;
>> -     struct bio_vec *bvecs = kzalloc(bio->bi_vcnt * sizeof(struct bio_vec),
>> +     unsigned vcnt = bio_segments_all(bio);
>> +     struct bio_vec *bvecs = kzalloc(vcnt * sizeof(struct bio_vec),
>>                                       GFP_NOIO);
>
> Maybe use kcalloc() instead of kzalloc() with a multiplication.

That doesn't belong to this patch, which just wants to remove direct
access to .bi_vcnt.


Thanks,
Ming Lei