Hey, Kent.
On Thu, May 17, 2012 at 10:59:50PM -0400, koverstreet@xxxxxxxxxx wrote:
> From: Kent Overstreet <koverstreet@xxxxxxxxxx>
>
> This consolidates some code, and will help in a later patch changing how
> bio cloning works.
>
> Signed-off-by: Kent Overstreet <koverstreet@xxxxxxxxxx>
I'd prefer a bit more explanation on what's going on generally and why
and how dm conversion is different.
> diff --git a/drivers/md/dm.c b/drivers/md/dm.c
> index 3cc2169..3e33039 100644
> --- a/drivers/md/dm.c
> +++ b/drivers/md/dm.c
> @@ -1072,26 +1072,19 @@ static struct bio *split_bvec(struct bio *bio, sector_t sector,
> * Creates a bio that consists of range of complete bvecs.
> */
> static struct bio *clone_bio(struct bio *bio, sector_t sector,
> - unsigned short idx, unsigned short bv_count,
> + unsigned short bv_count,
> unsigned int len, struct bio_set *bs)
> {
> struct bio *clone;
>
> - clone = bio_alloc_bioset(GFP_NOIO, bio->bi_max_vecs, bs);
> - __bio_clone(clone, bio);
> + clone = bio_clone_bioset(bio, GFP_NOIO, bs);
> clone->bi_sector = sector;
> - clone->bi_idx = idx;
> - clone->bi_vcnt = idx + bv_count;
> + clone->bi_vcnt = bv_count;
> clone->bi_size = to_bytes(len);
> - clone->bi_flags &= ~(1 << BIO_SEG_VALID);
Maybe removal of @idx deserves a separate patch?
> - if (bio_integrity(bio)) {
> - bio_integrity_clone(clone, bio, GFP_NOIO, bs);
> -
> - if (idx != bio->bi_idx || clone->bi_size < bio->bi_size)
> - bio_integrity_trim(clone,
> - bio_sector_offset(bio, idx, 0), len);
> - }
> + if (bio_integrity(bio) &&
> + clone->bi_size < bio->bi_size)
Unnecessary line break.
Other than that, looks good to me.
Thanks.
--
tejun
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