From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kent Overstreet Subject: [PATCH v2 04/26] md: Convert md_trim_bio() to use bio_advance() Date: Mon, 10 Sep 2012 17:22:15 -0700 Message-ID: <1347322957-25260-5-git-send-email-koverstreet@google.com> References: <1347322957-25260-1-git-send-email-koverstreet@google.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1347322957-25260-1-git-send-email-koverstreet@google.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org, dm-devel@redhat.com Cc: axboe@kernel.dk, tj@kernel.org, Kent Overstreet List-Id: linux-bcache@vger.kernel.org Signed-off-by: Kent Overstreet CC: Jens Axboe CC: NeilBrown --- drivers/md/md.c | 19 +++++-------------- 1 file changed, 5 insertions(+), 14 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 7a2b079..51ce48c 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -190,25 +190,16 @@ void md_trim_bio(struct bio *bio, int offset, int size) struct bio_vec *bvec; int sofar = 0; - size <<= 9; if (offset == 0 && size == bio->bi_size) return; - bio->bi_sector += offset; - bio->bi_size = size; - offset <<= 9; clear_bit(BIO_SEG_VALID, &bio->bi_flags); - while (bio->bi_idx < bio->bi_vcnt && - bio->bi_io_vec[bio->bi_idx].bv_len <= offset) { - /* remove this whole bio_vec */ - offset -= bio->bi_io_vec[bio->bi_idx].bv_len; - bio->bi_idx++; - } - if (bio->bi_idx < bio->bi_vcnt) { - bio->bi_io_vec[bio->bi_idx].bv_offset += offset; - bio->bi_io_vec[bio->bi_idx].bv_len -= offset; - } + bio_advance(bio, offset << 9); + + size <<= 9; + bio->bi_size = size; + /* avoid any complications with bi_idx being non-zero*/ if (bio->bi_idx) { memmove(bio->bi_io_vec, bio->bi_io_vec+bio->bi_idx, -- 1.7.12