io_uring: improve req fields comments

Move a misplaced comment about req->creds and add a line with
assumptions about req->link.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/1e51d1e6b1f3708c2d4127b4e371f9daa4c5f859.1648209006.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 e72f58e..0356b26 100644 (file)
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -935,10 +935,11 @@ struct io_kiocb {
        struct async_poll               *apoll;
        /* opcode allocated if it needs to store data for async defer */
        void                            *async_data;
-       /* custom credentials, valid IFF REQ_F_CREDS is set */
        /* stores selected buf, valid IFF REQ_F_BUFFER_SELECTED is set */
        struct io_buffer                *kbuf;
+       /* linked requests, IFF REQ_F_HARDLINK or REQ_F_LINK are set */
        struct io_kiocb                 *link;
+       /* custom credentials, valid IFF REQ_F_CREDS is set */
        const struct cred               *creds;
        struct io_wq_work               work;
 };