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raid5: avoid unnecessary bio data set

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bio_reset doesn't change bi_io_vec and bi_max_vecs, so we don't need to
set them every time. bi_private will be set before the bio is
dispatched.

Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Shaohua Li 2016-08-22 21:14:02 -07:00
parent 5f9d1fde7d
commit 45c91d808f
1 changed files with 5 additions and 8 deletions
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13
drivers/md/raid5.c
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@ -2005,7 +2005,12 @@ static struct stripe_head *alloc_stripe(struct kmem_cache *sc, gfp_t gfp,
struct r5dev *dev = &sh->dev[i];
bio_init(&dev->req);
dev->req.bi_io_vec = &dev->vec;
dev->req.bi_max_vecs = 1;
bio_init(&dev->rreq);
dev->rreq.bi_io_vec = &dev->rvec;
dev->rreq.bi_max_vecs = 1;
}
}
return sh;
@ -2507,14 +2512,6 @@ static void raid5_build_block(struct stripe_head *sh, int i, int previous)
{
struct r5dev *dev = &sh->dev[i];
dev->req.bi_io_vec = &dev->vec;
dev->req.bi_max_vecs = 1;
dev->req.bi_private = sh;
dev->rreq.bi_io_vec = &dev->rvec;
dev->rreq.bi_max_vecs = 1;
dev->rreq.bi_private = sh;
dev->flags = 0;
dev->sector = raid5_compute_blocknr(sh, i, previous);
}