[RFC PATCH 00/34] block: introduce bio_new()

Chaitanya Kulkarni
2021-01-28T07:57:57Z

Hi,

This is a *compile only RFC* which adds a generic helper to initialize
the various fields of the bio that is repeated all the places in
file-systems, block layer, and drivers.

The new helper allows callers to initialize non-optional members of bio
such as bdev, sector, op, opflags, max_bvecs and gfp_mask by
encapsulating new bio allocation with bio alloc with initialization
at one place.

The objective of this RFC is to only start a discussion, this it not
completely tested at all.

-ck

Chaitanya Kulkarni (34):
block: move common code into blk_next_bio()
block: introduce and use bio_new
drdb: use bio_new in drdb
drdb: use bio_new() in submit_one_flush
xen-blkback: use bio_new
zram: use bio_new
dm: use bio_new in dm-log-writes
dm-zoned: use bio_new in get_mblock_slow
dm-zoned: use bio_new in dmz_write_mblock
dm-zoned: use bio_new in dmz_rdwr_block
nvmet: use bio_new in nvmet_bdev_execute_rw
scsi: target/iblock: use bio_new
block: use bio_new in __blkdev_direct_IO
fs/buffer: use bio_new in submit_bh_wbc
fscrypt: use bio_new in fscrypt_zeroout_range
fs/direct-io: use bio_new in dio_bio_alloc
iomap: use bio_new in iomap_dio_zero
iomap: use bio_new in iomap_dio_bio_actor
fs/jfs/jfs_logmgr.c: use bio_new in lbmRead
fs/jfs/jfs_logmgr.c: use bio_new in lbmStartIO
fs/jfs/jfs_metapage.c: use bio_new in metapage_writepage
fs/jfs/jfs_metapage.c: use bio_new in metapage_readpage
fs/mpage.c: use bio_new mpage_alloc
fs/nilfs: use bio_new nilfs_alloc_seg_bio
ocfs/cluster: use bio_new in dm-log-writes
xfs: use bio_new in xfs_rw_bdev
xfs: use bio_new in xfs_buf_ioapply_map
zonefs: use bio_new
power/swap: use bio_new in hib_submit_io
hfsplus: use bio_new in hfsplus_submit_bio()
iomap: use bio_new in iomap_readpage_actor
mm: use bio_new in __swap_writepage
mm: use bio_new in swap_readpage
mm: add swap_bio_new common bio helper

block/blk-lib.c | 34 ++++++++++-------------------
block/blk-zoned.c | 4 +---
block/blk.h | 5 +++--
drivers/block/drbd/drbd_receiver.c | 12 +++++-----
drivers/block/xen-blkback/blkback.c | 20 +++++++++++------
drivers/block/zram/zram_drv.c | 5 ++---
drivers/md/dm-log-writes.c | 30 +++++++++----------------
drivers/md/dm-zoned-metadata.c | 18 +++++----------
drivers/nvme/target/io-cmd-bdev.c | 9 +++-----
drivers/target/target_core_iblock.c | 5 ++---
fs/block_dev.c | 6 ++---
fs/buffer.c | 16 ++++++--------
fs/crypto/bio.c | 5 ++---
fs/direct-io.c | 6 ++---
fs/hfsplus/wrapper.c | 5 +----
fs/iomap/buffered-io.c | 12 +++++-----
fs/iomap/direct-io.c | 11 ++++------
fs/jfs/jfs_logmgr.c | 13 ++++-------
fs/jfs/jfs_metapage.c | 15 +++++--------
fs/mpage.c | 18 +++++----------
fs/nilfs2/segbuf.c | 10 ++-------
fs/ocfs2/cluster/heartbeat.c | 6 ++---
fs/xfs/xfs_bio_io.c | 7 ++----
fs/xfs/xfs_buf.c | 6 ++---
fs/zonefs/super.c | 6 ++---
include/linux/bio.h | 25 +++++++++++++++++++++
kernel/power/swap.c | 7 +++---
mm/page_io.c | 30 +++++++++++++------------
28 files changed, 151 insertions(+), 195 deletions(-)

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2.22.1