Initial import

1 files changed, 50 insertions, 0 deletions

diff --git a/include/linux/async.h b/include/linux/async.h
new file mode 100644
index 000000000..6b0226bda
--- /dev/null
+++ b/include/linux/async.h
@@ -0,0 +1,50 @@
+/*
+ * async.h: Asynchronous function calls for boot performance
+ *
+ * (C) Copyright 2009 Intel Corporation
+ * Author: Arjan van de Ven <arjan@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; version 2
+ * of the License.
+ */
+#ifndef __ASYNC_H__
+#define __ASYNC_H__
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+typedef u64 async_cookie_t;
+typedef void (*async_func_t) (void *data, async_cookie_t cookie);
+struct async_domain {
+	struct list_head pending;
+	unsigned registered:1;
+};
+
+/*
+ * domain participates in global async_synchronize_full
+ */
+#define ASYNC_DOMAIN(_name) \
+	struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending),	\
+				      .registered = 1 }
+
+/*
+ * domain is free to go out of scope as soon as all pending work is
+ * complete, this domain does not participate in async_synchronize_full
+ */
+#define ASYNC_DOMAIN_EXCLUSIVE(_name) \
+	struct async_domain _name = { .pending = LIST_HEAD_INIT(_name.pending), \
+				      .registered = 0 }
+
+extern async_cookie_t async_schedule(async_func_t func, void *data);
+extern async_cookie_t async_schedule_domain(async_func_t func, void *data,
+					    struct async_domain *domain);
+void async_unregister_domain(struct async_domain *domain);
+extern void async_synchronize_full(void);
+extern void async_synchronize_full_domain(struct async_domain *domain);
+extern void async_synchronize_cookie(async_cookie_t cookie);
+extern void async_synchronize_cookie_domain(async_cookie_t cookie,
+					    struct async_domain *domain);
+extern bool current_is_async(void);
+#endif