From a4a51d395827b4c4d8d68bd8708dd386c6cc694e Mon Sep 17 00:00:00 2001 From: Zach Brown Date: Fri, 14 Jun 2013 15:54:19 -0500 Subject: [PATCH] bio: add bvec_length(), like iov_length() Signed-off-by: Dave Kleikamp Cc: Zach Brown --- include/linux/bio.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/bio.h b/include/linux/bio.h index ec48bac5b039..4fd525342596 100644 --- a/include/linux/bio.h +++ b/include/linux/bio.h @@ -307,6 +307,14 @@ extern struct bio_vec *bvec_alloc(gfp_t, int, unsigned long *, mempool_t *); extern void bvec_free(mempool_t *, struct bio_vec *, unsigned int); extern unsigned int bvec_nr_vecs(unsigned short idx); +static inline ssize_t bvec_length(const struct bio_vec *bvec, unsigned long nr) +{ + ssize_t bytes = 0; + while (nr--) + bytes += (bvec++)->bv_len; + return bytes; +} + #ifdef CONFIG_BLK_CGROUP int bio_associate_current(struct bio *bio); void bio_disassociate_task(struct bio *bio); -- 2.39.5