On 9/24/24 11:24, Kanchan Joshi wrote:

struct kiocb has a 2 bytes hole that developed post commit 41d36a9f3e53
("fs: remove kiocb.ki_hint").
But write hint has made a comeback with commit 449813515d3e ("block, fs:
Restore the per-bio/request data lifetime fields").

This patch uses the leftover space in kiocb to carve 1 byte field
ki_write_hint.
Restore the code that operates on kiocb to use ki_write_hint instead of
inode hint value.

This does not bring any behavior change, but needed to enable per-io
hints (by another patch).

Signed-off-by: Kanchan Joshi <redacted>
Signed-off-by: Nitesh Shetty <redacted>
---
  block/fops.c         | 6 +++---
  fs/aio.c             | 1 +
  fs/cachefiles/io.c   | 1 +
  fs/direct-io.c       | 2 +-
  fs/iomap/direct-io.c | 2 +-
  include/linux/fs.h   | 8 ++++++++
  io_uring/rw.c        | 1 +
  7 files changed, 16 insertions(+), 5 deletions(-)

Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke                  Kernel Storage Architect
hare@suse.de                                +49 911 74053 688
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