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Commit 7a67f63b authored by Jens Axboe's avatar Jens Axboe
Browse files

block: add bio_has_data() to detect whether a bio carries data or not 



Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 35e396cd

include/linux/bio.h

+8 −0
Original line number Diff line number Diff line
@@ -445,6 +445,14 @@ static inline char *__bio_kmap_irq(struct bio *bio, unsigned short idx, 
	__bio_kmap_irq((bio), (bio)->bi_idx, (flags))

#define bio_kunmap_irq(buf,flags)	__bio_kunmap_irq(buf, flags)



/*

 * Check whether this bio carries any data or not. A NULL bio is allowed.

 */

static inline int bio_has_data(struct bio *bio)

{

	return bio && bio->bi_io_vec != NULL;

}



#if defined(CONFIG_BLK_DEV_INTEGRITY)



#define bip_vec_idx(bip, idx)	(&(bip->bip_vec[(idx)]))