netdev - add bvec initialization helpers v2

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Date:   Fri,  3 Feb 2023 16:06:11 +0100
From:   Christoph Hellwig <hch@....de>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     Ilya Dryomov <idryomov@...il.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Minchan Kim <minchan@...nel.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Keith Busch <kbusch@...nel.org>,
        Sagi Grimberg <sagi@...mberg.me>,
        Chaitanya Kulkarni <kch@...dia.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        David Howells <dhowells@...hat.com>,
        Marc Dionne <marc.dionne@...istor.com>,
        Xiubo Li <xiubli@...hat.com>, Steve French <sfrench@...ba.org>,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Anna Schumaker <anna@...nel.org>,
        Mike Marshall <hubcap@...ibond.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Chuck Lever <chuck.lever@...cle.com>,
        linux-block@...r.kernel.org, ceph-devel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-nvme@...ts.infradead.org, linux-scsi@...r.kernel.org,
        target-devel@...r.kernel.org, kvm@...r.kernel.org,
        netdev@...r.kernel.org, linux-afs@...ts.infradead.org,
        linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
        linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
        devel@...ts.orangefs.org, io-uring@...r.kernel.org,
        linux-mm@...ck.org
Subject: add bvec initialization helpers v2

Hi all,

this series adds the helpers to initalize a bvec.  These remove open coding of
bvec internals and help with experimenting with other representations like
a phys_addr_t instead of page + offset.

Changes since v1:
 - fix a typo
 - simplify the code in ceph's __iter_get_bvecs a little bit further
 - fix two subject prefixes

Diffstat:
 block/bio-integrity.c             |    7 ------
 block/bio.c                       |   12 +----------
 drivers/block/rbd.c               |    7 ++----
 drivers/block/virtio_blk.c        |    4 ---
 drivers/block/zram/zram_drv.c     |   15 +++-----------
 drivers/nvme/host/core.c          |    4 ---
 drivers/nvme/target/io-cmd-file.c |   10 +--------
 drivers/nvme/target/tcp.c         |    5 +---
 drivers/scsi/sd.c                 |   36 ++++++++++++++++------------------
 drivers/target/target_core_file.c |   18 +++++------------
 drivers/vhost/vringh.c            |    5 +---
 fs/afs/write.c                    |    8 ++-----
 fs/ceph/file.c                    |   12 +++--------
 fs/cifs/connect.c                 |    5 ++--
 fs/cifs/fscache.c                 |   16 +++++----------
 fs/cifs/misc.c                    |    5 +---
 fs/cifs/smb2ops.c                 |    6 ++---
 fs/coredump.c                     |    7 +-----
 fs/nfs/fscache.c                  |   16 +++++----------
 fs/orangefs/inode.c               |   22 ++++++--------------
 fs/splice.c                       |    5 +---
 include/linux/bvec.h              |   40 ++++++++++++++++++++++++++++++++++++++
 io_uring/rsrc.c                   |    4 ---
 mm/page_io.c                      |    8 +------
 net/ceph/messenger_v1.c           |    7 +-----
 net/ceph/messenger_v2.c           |   28 ++++++++++----------------
 net/rxrpc/rxperf.c                |    8 ++-----
 net/sunrpc/svcsock.c              |    7 +-----
 net/sunrpc/xdr.c                  |    5 +---
 29 files changed, 142 insertions(+), 190 deletions(-)