[BLOCK] bio: init ->bi_bdev in bio_init()
For SG_IO requests, bio->bi_bdev may not be explicitly initialized. So make bio_init() clear the field to make sure it's always NULL or valid. Signed-off-by: Jens Axboe <axboe@suse.de>
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fs/bio.c
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fs/bio.c
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@ -126,6 +126,7 @@ static void bio_fs_destructor(struct bio *bio)
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inline void bio_init(struct bio *bio)
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{
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bio->bi_next = NULL;
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bio->bi_bdev = NULL;
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bio->bi_flags = 1 << BIO_UPTODATE;
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bio->bi_rw = 0;
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bio->bi_vcnt = 0;
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