io_uring: move apoll cache to poll.c

This is where it's used, move the flush handler in there.
Signed-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/io_uring.c

@@ -2445,18 +2445,6 @@ static void io_req_caches_free(struct io_ring_ctx *ctx)
 	mutex_unlock(&ctx->uring_lock);
 }
 
-static void io_flush_apoll_cache(struct io_ring_ctx *ctx)
-{
-	struct async_poll *apoll;
-
-	while (!list_empty(&ctx->apoll_cache)) {
-		apoll = list_first_entry(&ctx->apoll_cache, struct async_poll,
-						poll.wait.entry);
-		list_del(&apoll->poll.wait.entry);
-		kfree(apoll);
-	}
-}
-
 static __cold void io_ring_ctx_free(struct io_ring_ctx *ctx)
 {
 	io_sq_thread_finish(ctx);

io_uring/poll.c

@@ -959,3 +959,15 @@ int io_poll_remove(struct io_kiocb *req, unsigned int issue_flags)
 	io_req_set_res(req, ret, 0);
 	return IOU_OK;
 }
+
+void io_flush_apoll_cache(struct io_ring_ctx *ctx)
+{
+	struct async_poll *apoll;
+
+	while (!list_empty(&ctx->apoll_cache)) {
+		apoll = list_first_entry(&ctx->apoll_cache, struct async_poll,
+						poll.wait.entry);
+		list_del(&apoll->poll.wait.entry);
+		kfree(apoll);
+	}
+}

io_uring/poll.h

@@ -30,3 +30,5 @@ int io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
 int io_arm_poll_handler(struct io_kiocb *req, unsigned issue_flags);
 bool io_poll_remove_all(struct io_ring_ctx *ctx, struct task_struct *tsk,
 			bool cancel_all);
+
+void io_flush_apoll_cache(struct io_ring_ctx *ctx);