[PATCH v1 02/11] io_uring: wire up inline completion path for CQE32

Stefan Roesch
2022-04-19T20:56:53Z

Rather than always use the slower locked path, wire up use of the
deferred completion path that normal CQEs can take. This reuses the
hash list node for the storage we need to hold the two 64-bit values
that must be passed back.

Co-developed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Stefan Roesch <shr@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
fs/io_uring.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 4c32cf987ef3..bf2b02518332 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -964,7 +964,13 @@ struct io_kiocb {
atomic_t poll_refs;
struct io_task_work io_task_work;
/* for polled requests, i.e. IORING_OP_POLL_ADD and async armed poll */
- struct hlist_node hash_node;
+ union {
+ struct hlist_node hash_node;
+ struct {
+ u64 extra1;
+ u64 extra2;
+ };
+ };
/* internal polling, see IORING_FEAT_FAST_POLL */
struct async_poll *apoll;
/* opcode allocated if it needs to store data for async defer */
--
2.30.2