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md/raid5: For stripe with R5_ReadNoMerge, we replace REQ_FLUSH with REQ_NOMERGE.
For R5_ReadNoMerge,it mean this bio can't merge with other bios or request.It used REQ_FLUSH to achieve this. But REQ_NOMERGE can do the same work. Signed-off-by: Jianpeng Ma <majianpeng@gmail.com> Signed-off-by: NeilBrown <neilb@suse.de>
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@ -874,7 +874,7 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
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bi->bi_sector = (sh->sector
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+ rdev->data_offset);
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if (test_bit(R5_ReadNoMerge, &sh->dev[i].flags))
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bi->bi_rw |= REQ_FLUSH;
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bi->bi_rw |= REQ_NOMERGE;
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bi->bi_vcnt = 1;
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bi->bi_io_vec[0].bv_len = STRIPE_SIZE;
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