block: add bio_has_data() to detect whether a bio carries data or not
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>wifi-calibration
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35e396cd10
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7a67f63b32
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@ -445,6 +445,14 @@ static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx,
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__bio_kmap_irq((bio), (bio)->bi_idx, (flags))
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__bio_kmap_irq((bio), (bio)->bi_idx, (flags))
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#define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags)
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#define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags)
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/*
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* Check whether this bio carries any data or not. A NULL bio is allowed.
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*/
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static inline int bio_has_data(struct bio *bio)
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{
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return bio && bio->bi_io_vec != NULL;
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}
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#if defined(CONFIG_BLK_DEV_INTEGRITY)
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#if defined(CONFIG_BLK_DEV_INTEGRITY)
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#define bip_vec_idx(bip, idx) (&(bip->bip_vec[(idx)]))
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#define bip_vec_idx(bip, idx) (&(bip->bip_vec[(idx)]))
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