Question - in raid1.c, for example, I see:
mbio = bio_clone(bio, GFP_NOIO);
...
mbio->bi_sector = r1_bio->sector + conf->mirrors[i].rdev->data_offset;
but I don't think bio_clone is GUARANTEED to produce a non-null result,
is it? It uses bio_alloc to get a bio, and bio_alloc does ...
bio = mempool_alloc(bio_pool, gfp_mask);
if (unlikely(!bio))
goto out;
out:
return bio;
}
mempool_free(bio, bio_pool);
bio = NULL;
goto out;
So it looks perfectly capable of producing a NULL.
Peter
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