On 3 June 2016 at 22:38, Jens Axboe <axboe@xxxxxxxxx> wrote:
> On 05/27/2016 05:11 AM, Baolin Wang wrote:
>>
>> +/*
>> + * Map a bio to scatterlist, return number of sg entries setup. Caller
>> must
>> + * make sure sg can hold bio segments entries.
>> + */
>> +int blk_bio_map_sg(struct request_queue *q, struct bio *bio,
>> + struct scatterlist *sglist)
>> +{
>> + struct scatterlist *sg = NULL;
>> + int nsegs = 0;
>> +
>> + if (bio)
>> + nsegs = __blk_bios_map_sg(q, bio, sglist, &sg, true);
>> +
>> + if (sg)
>> + sg_mark_end(sg);
>
>
> Put that if (sg) inside the if (bio) section, 'sg' isn't going to be
> non-NULL outside of that.
>
> Additionally, who would call this with a NULL bio? That seems odd, I'd
> get rid of that check completely.
OK. I'll fix these in next version. Thanks for your comments.
--
Baolin.wang
Best Regards
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