forked from luck/tmp_suning_uos_patched
md/raid5: remove redundant bio initialisations.
We current initialise some fields of a bio when preparing a stripe_head, and again just before submitting the request. Remove the duplication by only setting the fields that lower level devices don't touch in raid5_build_block, and only set the changeable fields in ops_run_io. Reviewed-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: NeilBrown <neilb@suse.de>
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@ -574,10 +574,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
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atomic_inc(&sh->count);
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bi->bi_sector = sh->sector + rdev->data_offset;
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bi->bi_flags = 1 << BIO_UPTODATE;
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bi->bi_vcnt = 1;
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bi->bi_max_vecs = 1;
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bi->bi_idx = 0;
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bi->bi_io_vec = &sh->dev[i].vec;
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bi->bi_io_vec[0].bv_len = STRIPE_SIZE;
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bi->bi_io_vec[0].bv_offset = 0;
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bi->bi_size = STRIPE_SIZE;
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@ -1720,12 +1717,8 @@ static void raid5_build_block(struct stripe_head *sh, int i, int previous)
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dev->req.bi_io_vec = &dev->vec;
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dev->req.bi_vcnt++;
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dev->req.bi_max_vecs++;
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dev->vec.bv_page = dev->page;
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dev->vec.bv_len = STRIPE_SIZE;
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dev->vec.bv_offset = 0;
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dev->req.bi_sector = sh->sector;
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dev->req.bi_private = sh;
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dev->vec.bv_page = dev->page;
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dev->flags = 0;
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dev->sector = compute_blocknr(sh, i, previous);
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