From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 25 Oct 2021 19:45:12 +0000 (-0600)
Subject: io_uring: don't assign write hint in the read path
X-Git-Tag: v6.6.17~9008^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3884b83dff245e41def99ceacca8ed2056baf0a8;p=platform%2Fkernel%2Flinux-rpi.git

io_uring: don't assign write hint in the read path

Move this out of the generic read/write prep path, and place it in the
write specific kiocb setup instead.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index bba2f77..d001cd7 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2825,7 +2825,6 @@ static int io_prep_rw(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 		req->flags |= REQ_F_CUR_POS;
 		kiocb->ki_pos = file->f_pos;
 	}
-	kiocb->ki_hint = ki_hint_validate(file_write_hint(file));
 	kiocb->ki_flags = iocb_flags(file);
 	ret = kiocb_set_rw_flags(kiocb, READ_ONCE(sqe->rw_flags));
 	if (unlikely(ret))
@@ -3568,6 +3567,7 @@ static int io_write_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 {
 	if (unlikely(!(req->file->f_mode & FMODE_WRITE)))
 		return -EBADF;
+	req->rw.kiocb.ki_hint = ki_hint_validate(file_write_hint(req->file));
 	return io_prep_rw(req, sqe);
 }