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authorMing Lei <ming.lei@redhat.com>2017-12-18 15:22:07 +0300
committerJens Axboe <axboe@kernel.dk>2018-01-06 19:18:00 +0300
commit3c892a098b0bfa3e571f1f0d2a7e72fbaeea691a (patch)
tree93a2f8c318cf22449587d8c3e9a1df6d52a4cc10 /include/linux/bvec.h
parent7891f05cbf4944a5436491d66de2be7533089aea (diff)
downloadlinux-3c892a098b0bfa3e571f1f0d2a7e72fbaeea691a.tar.xz
block: bounce: don't access bio->bi_io_vec in copy_to_high_bio_irq
Firstly this patch introduces BVEC_ITER_ALL_INIT for iterating one bio from start to end. As we need to support multipage bvecs, don't access bio->bi_io_vec in copy_to_high_bio_irq(), and just use the standard iterator for that. Signed-off-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/linux/bvec.h')
-rw-r--r--include/linux/bvec.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index ec8a4d7af6bd..fe7a22dd133b 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -125,4 +125,13 @@ static inline bool bvec_iter_rewind(const struct bio_vec *bv,
((bvl = bvec_iter_bvec((bio_vec), (iter))), 1); \
bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len))
+/* for iterating one bio from start to end */
+#define BVEC_ITER_ALL_INIT (struct bvec_iter) \
+{ \
+ .bi_sector = 0, \
+ .bi_size = UINT_MAX, \
+ .bi_idx = 0, \
+ .bi_bvec_done = 0, \
+}
+
#endif /* __LINUX_BVEC_ITER_H */