From: Zach Brown <zab@xxxxxxxxx>
Signed-off-by: Zach Brown <zab@xxxxxxxxx>
Signed-off-by: Dave Kleikamp <dave.kleikamp@xxxxxxxxxx>
Tested-by: Sedat Dilek <sedat.dilek@xxxxxxxxx>
---
include/linux/bio.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/include/linux/bio.h b/include/linux/bio.h
index ec48bac..4fd5253 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);
--
1.8.4
--
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