block: Convert bio_iovec() to bvec_iter

For immutable biovecs, we'll be introducing a new bio_iovec() that uses
our new bvec iterator to construct a biovec, taking into account
bvec_iter->bi_bvec_done - this patch updates existing users for the new
usage.

Some of the existing users really do need a pointer into the bvec array
- those uses are all going to be removed, but we'll need the
functionality from immutable to remove them - so for now rename the
existing bio_iovec() -> __bio_iovec(), and it'll be removed in a couple
patches.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: "Ed L. Cashin" <ecashin@coraid.com>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: dm-devel@redhat.com
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>

1 files changed, 10 insertions, 10 deletions

diff --git a/fs/bio.c b/fs/bio.c
index a402ad6..7bb281f 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -821,12 +821,12 @@ void bio_advance(struct bio *bio, unsigned bytes)
 			break;
 		}
 
-		if (bytes >= bio_iovec(bio)->bv_len) {
-			bytes -= bio_iovec(bio)->bv_len;
+		if (bytes >= bio_iovec(bio).bv_len) {
+			bytes -= bio_iovec(bio).bv_len;
 			bio->bi_iter.bi_idx++;
 		} else {
-			bio_iovec(bio)->bv_len -= bytes;
-			bio_iovec(bio)->bv_offset += bytes;
+			bio_iovec(bio).bv_len -= bytes;
+			bio_iovec(bio).bv_offset += bytes;
 			bytes = 0;
 		}
 	}
@@ -879,8 +879,8 @@ void bio_copy_data(struct bio *dst, struct bio *src)
 	unsigned src_offset, dst_offset, bytes;
 	void *src_p, *dst_p;
 
-	src_bv = bio_iovec(src);
-	dst_bv = bio_iovec(dst);
+	src_bv = __bio_iovec(src);
+	dst_bv = __bio_iovec(dst);
 
 	src_offset = src_bv->bv_offset;
 	dst_offset = dst_bv->bv_offset;
@@ -893,7 +893,7 @@ void bio_copy_data(struct bio *dst, struct bio *src)
 				if (!src)
 					break;
 
-				src_bv = bio_iovec(src);
+				src_bv = __bio_iovec(src);
 			}
 
 			src_offset = src_bv->bv_offset;
@@ -906,7 +906,7 @@ void bio_copy_data(struct bio *dst, struct bio *src)
 				if (!dst)
 					break;
 
-				dst_bv = bio_iovec(dst);
+				dst_bv = __bio_iovec(dst);
 			}
 
 			dst_offset = dst_bv->bv_offset;
@@ -1776,8 +1776,8 @@ struct bio_pair *bio_split(struct bio *bi, int first_sectors)
 	bp->bio1.bi_iter.bi_size = first_sectors << 9;
 
 	if (bi->bi_vcnt != 0) {
-		bp->bv1 = *bio_iovec(bi);
-		bp->bv2 = *bio_iovec(bi);
+		bp->bv1 = bio_iovec(bi);
+		bp->bv2 = bio_iovec(bi);
 
 		if (bio_is_rw(bi)) {
 			bp->bv2.bv_offset += first_sectors << 9;