From: Pavel Begunkov <asml.silence@gmail.com>
Date: Thu, 18 Feb 2021 18:29:46 +0000 (+0000)
Subject: io_uring: don't do async setup for links' heads
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1ee43ba8d267b5e6729c45b8756263f69c2978cc;p=linux.git

io_uring: don't do async setup for links' heads

Now, as we can do async setup without holding an SQE, we can skip doing
io_req_defer_prep() for link heads, it will be tried to be executed
inline and follows all the rules of the non-linked requests.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 7d54b0abbb828..45f78fd25ce29 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -6820,9 +6820,6 @@ fail_req:
 			ctx->drain_next = 0;
 		}
 		if (req->flags & (REQ_F_LINK | REQ_F_HARDLINK)) {
-			ret = io_req_defer_prep(req);
-			if (unlikely(ret))
-				req->flags |= REQ_F_FAIL_LINK;
 			link->head = req;
 			link->last = req;
 		} else {