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iomap: only set iocb->private for polled bio

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iocb->private is only used for polled IO, where the completer will
find the bio to poll through that field.

Assign it when we're submitting a polled bio, and get rid of the
dio->poll_bio indirection.

Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2023-07-20 11:47:56 -06:00
parent 3a0be38cc8
commit daa99c5a33
1 changed files with 5 additions and 8 deletions
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13
fs/iomap/direct-io.c
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@ -41,7 +41,6 @@ struct iomap_dio {
struct {
struct iov_iter *iter;
struct task_struct *waiter;
struct bio *poll_bio;
} submit;
/* used for aio completion: */
@ -63,12 +62,14 @@ static struct bio *iomap_dio_alloc_bio(const struct iomap_iter *iter,
static void iomap_dio_submit_bio(const struct iomap_iter *iter,
struct iomap_dio *dio, struct bio *bio, loff_t pos)
{
struct kiocb *iocb = dio->iocb;
atomic_inc(&dio->ref);
/* Sync dio can't be polled reliably */
if ((dio->iocb->ki_flags & IOCB_HIPRI) && !is_sync_kiocb(dio->iocb)) {
bio_set_polled(bio, dio->iocb);
dio->submit.poll_bio = bio;
if ((iocb->ki_flags & IOCB_HIPRI) && !is_sync_kiocb(iocb)) {
bio_set_polled(bio, iocb);
WRITE_ONCE(iocb->private, bio);
}
if (dio->dops && dio->dops->submit_io)
@ -184,7 +185,6 @@ void iomap_dio_bio_end_io(struct bio *bio)
* more IO to be issued to finalise filesystem metadata changes or
* guarantee data integrity.
*/
WRITE_ONCE(iocb->private, NULL);
INIT_WORK(&dio->aio.work, iomap_dio_complete_work);
queue_work(file_inode(iocb->ki_filp)->i_sb->s_dio_done_wq,
&dio->aio.work);
@ -523,7 +523,6 @@ __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
dio->submit.iter = iter;
dio->submit.waiter = current;
dio->submit.poll_bio = NULL;
if (iocb->ki_flags & IOCB_NOWAIT)
iomi.flags |= IOMAP_NOWAIT;
@ -633,8 +632,6 @@ __iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
if (dio->flags & IOMAP_DIO_WRITE_THROUGH)
dio->flags &= ~IOMAP_DIO_NEED_SYNC;
WRITE_ONCE(iocb->private, dio->submit.poll_bio);
/*
* We are about to drop our additional submission reference, which
* might be the last reference to the dio. There are three different