io_uring: stop using io_wq_work as an fd placeholder
There are two reasons why this isn't the best idea:
- It's an odd area to grab a bit of storage space, hence it's an odd area
to grab storage from.
- It puts the 3rd io_kiocb cacheline into the hot path, where normal hot
path just needs the first two.
Use 'cflags' for joint fd/cflags storage. We only need fd until we
successfully issue, and we only need cflags once a request is done and is
completed.
Fixes: 6bf9c47a3989 ("io_uring: defer file assignment")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
2 files changed
