io_uring: comment why inline complete calls io_clean_op()

io_req_complete_state() calls io_clean_op() and it may be not entirely
obvious, leave a comment.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/21806f862151e223fdf439e5e8ed7178a8d66979.1632516769.git.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 eff24d8..5a06063 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1822,6 +1822,7 @@ static void io_req_complete_state(struct io_kiocb *req, long res,
 {
        struct io_submit_state *state;
 
+       /* clean per-opcode space, because req->compl is aliased with it */
        if (io_req_needs_clean(req))
                io_clean_op(req);
        req->result = res;