io_uring: move io_eventfd_signal()

Move io_eventfd_signal() in the sources without any changes and kill its
forward declaration.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/9ebebb3f6f56f5a5448a621e0b6a537720c43334.1655637157.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/io_uring.c

@@ -142,8 +142,6 @@ static void io_queue_sqe(struct io_kiocb *req);
 
 static void __io_submit_flush_completions(struct io_ring_ctx *ctx);
 
-static void io_eventfd_signal(struct io_ring_ctx *ctx);
-
 static struct kmem_cache *req_cachep;
 
 struct sock *io_uring_get_socket(struct file *file)
@@ -472,20 +470,6 @@ static __cold void io_queue_deferred(struct io_ring_ctx *ctx)
 	}
 }
 
-void __io_commit_cqring_flush(struct io_ring_ctx *ctx)
-{
-	if (ctx->off_timeout_used || ctx->drain_active) {
-		spin_lock(&ctx->completion_lock);
-		if (ctx->off_timeout_used)
-			io_flush_timeouts(ctx);
-		if (ctx->drain_active)
-			io_queue_deferred(ctx);
-		spin_unlock(&ctx->completion_lock);
-	}
-	if (ctx->has_evfd)
-		io_eventfd_signal(ctx);
-}
-
 static void io_eventfd_signal(struct io_ring_ctx *ctx)
 {
 	struct io_ev_fd *ev_fd;
@@ -513,6 +497,20 @@ out:
 	rcu_read_unlock();
 }
 
+void __io_commit_cqring_flush(struct io_ring_ctx *ctx)
+{
+	if (ctx->off_timeout_used || ctx->drain_active) {
+		spin_lock(&ctx->completion_lock);
+		if (ctx->off_timeout_used)
+			io_flush_timeouts(ctx);
+		if (ctx->drain_active)
+			io_queue_deferred(ctx);
+		spin_unlock(&ctx->completion_lock);
+	}
+	if (ctx->has_evfd)
+		io_eventfd_signal(ctx);
+}
+
 /*
  * This should only get called when at least one event has been posted.
  * Some applications rely on the eventfd notification count only changing