Commit ecfc8492 authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
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io_uring: ensure only sqo_task has file notes 



For SQPOLL io_uring we want to have only one file note held by
sqo_task. Add a warning to make sure it holds. It's deep in
io_uring_add_task_file() out of hot path, so shouldn't hurt.

Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 0bead8cd

fs/io_uring.c

+4 −0
Original line number Diff line number Diff line
@@ -9099,6 +9099,10 @@ static int io_uring_add_task_file(struct io_ring_ctx *ctx, struct file *file) 
				fput(file);

				return ret;

			}



			/* one and only SQPOLL file note, held by sqo_task */

			WARN_ON_ONCE((ctx->flags & IORING_SETUP_SQPOLL) &&

				     current != ctx->sqo_task);

		}

		tctx->last = file;

	}