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    Subject[PATCH 0/9] Prep work for immutable bio vecs
    Date
    Random assortment of refactoring and trivial cleanups.

    Immutable bio vecs and efficient bio splitting require auditing and removing
    pretty much all bi_idx uses, among other things.

    The reason is that with immutable bio vecs we can't use the bvec array
    directly; if we have a partially completed bvec, that'll be indicated with a
    field in struct bvec_iter (which gets embedded in struct bio) - bi_bvec_done.

    bio_for_each_segments() will handle this transparently, so code needs to be
    converted to use it or some other generic accessor.

    Also, bio splitting means that when a driver gets a bio, bi_idx and
    bi_bvec_done may both be nonzero. Again, just need to use generic accessors.

    Kent Overstreet (9):
    block: Convert integrity to bvec_alloc_bs(), and a bugfix
    block: Add bio_advance()
    block: Refactor blk_update_request()
    md: Convert md_trim_bio() to use bio_advance()
    block: Add bio_end()
    block: Use bio_sectors() more consistently
    block: Don't use bi_idx in bio_split() or require it to be 0
    block: Remove bi_idx references
    block: Remove some unnecessary bi_vcnt usage

    block/blk-core.c | 86 ++++-----------------
    block/cfq-iosched.c | 7 +-
    block/deadline-iosched.c | 2 +-
    drivers/block/aoe/aoeblk.c | 2 +-
    drivers/block/aoe/aoecmd.c | 2 +-
    drivers/block/brd.c | 3 +-
    drivers/block/drbd/drbd_req.c | 8 +-
    drivers/block/floppy.c | 1 -
    drivers/block/pktcdvd.c | 8 +-
    drivers/block/ps3vram.c | 2 +-
    drivers/md/dm-raid1.c | 2 +-
    drivers/md/dm-stripe.c | 2 +-
    drivers/md/dm-verity.c | 4 +-
    drivers/md/faulty.c | 6 +-
    drivers/md/linear.c | 3 +-
    drivers/md/md.c | 19 ++---
    drivers/md/raid0.c | 9 +--
    drivers/md/raid1.c | 21 +++--
    drivers/md/raid10.c | 28 +++----
    drivers/md/raid5.c | 22 +++---
    drivers/message/fusion/mptsas.c | 6 +-
    drivers/s390/block/dcssblk.c | 3 +-
    drivers/scsi/libsas/sas_expander.c | 6 +-
    drivers/scsi/mpt2sas/mpt2sas_transport.c | 10 +--
    fs/bio-integrity.c | 128 ++++++++++---------------------
    fs/bio.c | 48 +++++++++++-
    fs/btrfs/extent_io.c | 3 +-
    fs/buffer.c | 1 -
    fs/gfs2/lops.c | 2 +-
    fs/jfs/jfs_logmgr.c | 2 -
    fs/logfs/dev_bdev.c | 5 --
    include/linux/bio.h | 8 +-
    include/trace/events/block.h | 10 +--
    mm/page_io.c | 1 -
    34 files changed, 192 insertions(+), 278 deletions(-)

    --
    1.7.12



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