From 4e5bc0a9a1d0be5b20a0366fbfbe5a99d61c6003 Mon Sep 17 00:00:00 2001
From: Stefan Roesch <shr@fb.com>
Date: Tue, 26 Apr 2022 11:21:24 -0700
Subject: [PATCH] io_uring: store add. return values for CQE32
Git-commit: 4e5bc0a9a1d0be5b20a0366fbfbe5a99d61c6003
Patch-mainline: v5.19-rc1
References: bsc#1205205

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>
Reviewed-by: Kanchan Joshi <joshi.k@samsung.com>
Link: https://lore.kernel.org/r/20220426182134.136504-3-shr@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Gabriel Krisman Bertazi <krisman@suse.de>
---
 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 106a0db56ddb..da91723e8741 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1003,7 +1003,13 @@ 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 */
-- 
2.35.3