io_uring: add a helper for poll clean

Add a helper for poll clean, it will be used in the multishot accept in
the later patches.

Signed-off-by: Hao Xu <howeyxu@tencent.com>

fs/io_uring.c

@@ -5711,6 +5711,23 @@ static int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 	return 0;
 }
 
+static inline void __io_poll_clean(struct io_kiocb *req)
+{
+	struct io_ring_ctx *ctx = req->ctx;
+
+	io_poll_remove_entries(req);
+	spin_lock(&ctx->completion_lock);
+	hash_del(&req->hash_node);
+	spin_unlock(&ctx->completion_lock);
+}
+
+#define REQ_F_APOLL_MULTI_POLLED (REQ_F_APOLL_MULTISHOT | REQ_F_POLLED)
+static inline void io_poll_clean(struct io_kiocb *req)
+{
+	if ((req->flags & REQ_F_APOLL_MULTI_POLLED) == REQ_F_APOLL_MULTI_POLLED)
+		__io_poll_clean(req);
+}
+
 static int io_accept(struct io_kiocb *req, unsigned int issue_flags)
 {
 	struct io_accept *accept = &req->accept;
@@ -6041,17 +6058,13 @@ static void io_poll_task_func(struct io_kiocb *req, bool *locked)
 
 static void io_apoll_task_func(struct io_kiocb *req, bool *locked)
 {
-	struct io_ring_ctx *ctx = req->ctx;
 	int ret;
 
 	ret = io_poll_check_events(req, locked);
 	if (ret > 0)
 		return;
 
-	io_poll_remove_entries(req);
-	spin_lock(&ctx->completion_lock);
-	hash_del(&req->hash_node);
-	spin_unlock(&ctx->completion_lock);
+	__io_poll_clean(req);
 
 	if (!ret)
 		io_req_task_submit(req, locked);