linux-kernel - [PATCH 1/1] io_uring: purge req->in

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Message-Id: <3ec455059ef8455418b0fbddf65e35ac9c6cc840.1581108187.git.asml.silence@gmail.com>
Date:   Fri,  7 Feb 2020 23:45:29 +0300
From:   Pavel Begunkov <asml.silence@...il.com>
To:     Jens Axboe <axboe@...nel.dk>, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/1] io_uring: purge req->in_async

req->in_async is not really needed, it only prevents propagation of nxt
in sync context. Remove it

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 fs/io_uring.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 42b7861b534c..2f8359f1d258 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -554,7 +554,6 @@ struct io_kiocb {
 	 * llist_node is only used for poll deferred completions
 	 */
 	struct llist_node		llist_node;
-	bool				in_async;
 	bool				needs_fixed_file;
 	u8				opcode;
 
@@ -1946,14 +1945,13 @@ static inline void io_rw_done(struct kiocb *kiocb, ssize_t ret)
 	}
 }
 
-static void kiocb_done(struct kiocb *kiocb, ssize_t ret, struct io_kiocb **nxt,
-		       bool in_async)
+static void kiocb_done(struct kiocb *kiocb, ssize_t ret, struct io_kiocb **nxt)
 {
 	struct io_kiocb *req = container_of(kiocb, struct io_kiocb, rw.kiocb);
 
 	if (req->flags & REQ_F_CUR_POS)
 		req->file->f_pos = kiocb->ki_pos;
-	if (in_async && ret >= 0 && kiocb->ki_complete == io_complete_rw)
+	if (ret >= 0 && kiocb->ki_complete == io_complete_rw)
 		*nxt = __io_complete_rw(kiocb, ret);
 	else
 		io_rw_done(kiocb, ret);
@@ -2245,7 +2243,7 @@ static int io_read(struct io_kiocb *req, struct io_kiocb **nxt,
 
 		/* Catch -EAGAIN return for forced non-blocking submission */
 		if (!force_nonblock || ret2 != -EAGAIN) {
-			kiocb_done(kiocb, ret2, nxt, req->in_async);
+			kiocb_done(kiocb, ret2, nxt);
 		} else {
 copy_iov:
 			ret = io_setup_async_rw(req, io_size, iovec,
@@ -2351,7 +2349,7 @@ static int io_write(struct io_kiocb *req, struct io_kiocb **nxt,
 		else
 			ret2 = loop_rw_iter(WRITE, req->file, kiocb, &iter);
 		if (!force_nonblock || ret2 != -EAGAIN) {
-			kiocb_done(kiocb, ret2, nxt, req->in_async);
+			kiocb_done(kiocb, ret2, nxt);
 		} else {
 copy_iov:
 			ret = io_setup_async_rw(req, io_size, iovec,
@@ -4483,7 +4481,6 @@ static void io_wq_submit_work(struct io_wq_work **workptr)
 	}
 
 	if (!ret) {
-		req->in_async = true;
 		do {
 			ret = io_issue_sqe(req, NULL, &nxt, false);
 			/*
@@ -5020,7 +5017,6 @@ static int io_submit_sqes(struct io_ring_ctx *ctx, unsigned int nr,
 			*mm = ctx->sqo_mm;
 		}
 
-		req->in_async = async;
 		req->needs_fixed_file = async;
 		trace_io_uring_submit_sqe(ctx, req->opcode, req->user_data,
 						true, async);
-- 
2.24.0