linux-kernel - [PATCH 5.10 01/54] io_uring: simplify io_task

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Date:   Thu, 11 Feb 2021 16:01:45 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jens Axboe <axboe@...nel.dk>,
        Pavel Begunkov <asml.silence@...il.com>
Subject: [PATCH 5.10 01/54] io_uring: simplify io_task_match()

From: Pavel Begunkov <asml.silence@...il.com>

[ Upstream commit 06de5f5973c641c7ae033f133ecfaaf64fe633a6 ]

If IORING_SETUP_SQPOLL is set all requests belong to the corresponding
SQPOLL task, so skip task checking in that case and always match.

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/io_uring.c |    6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1472,11 +1472,7 @@ static bool io_task_match(struct io_kioc
 
 	if (!tsk || req->task == tsk)
 		return true;
-	if (ctx->flags & IORING_SETUP_SQPOLL) {
-		if (ctx->sq_data && req->task == ctx->sq_data->thread)
-			return true;
-	}
-	return false;
+	return (ctx->flags & IORING_SETUP_SQPOLL);
 }
 
 /*