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io_uring: inline llist_add()

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We'll need to grab some information from the previous request in the tw
list, inline llist_add(), it'll be used in the following patch.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/f0165493af7b379943c792114b972f331e7d7d10.1680782017.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2023-04-06 14:20:11 +01:00 committed by Jens Axboe
parent 8501fe70ae
commit 5150940079
1 changed files with 8 additions and 1 deletions
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9
io_uring/io_uring.c
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@ -1303,8 +1303,15 @@ static __cold void io_fallback_tw(struct io_uring_task *tctx)
static void io_req_local_work_add(struct io_kiocb *req)
{
struct io_ring_ctx *ctx = req->ctx;
struct llist_node *first;
if (!llist_add(&req->io_task_work.node, &ctx->work_llist))
first = READ_ONCE(ctx->work_llist.first);
do {
req->io_task_work.node.next = first;
} while (!try_cmpxchg(&ctx->work_llist.first, &first,
&req->io_task_work.node));
if (first)
return;
/* needed for the following wake up */