[PATCH 1/8] fix a build error when including linux/async.h inanother header file

[Zhang Rui]

include/linux/async.h:16: error: redefinition of typedef âasync_cookie_tâ
include/linux/async.h:16: error: previous declaration of âasync_cookie_tâ was here
include/linux/async.h:17: error: redefinition of typedef âasync_func_ptrâ
include/linux/async.h:17: error: previous declaration of âasync_func_ptrâ was here

fix a problem that include/linux/async.h can not be included in another header file

Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
---
 include/linux/async.h |    3 +++
 1 file changed, 3 insertions(+)

Index: linux-2.6/include/linux/async.h
===================================================================
--- linux-2.6.orig/include/linux/async.h
+++ linux-2.6/include/linux/async.h
@@ -9,6 +9,8 @@
  * 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>
@@ -25,3 +27,4 @@ extern void async_synchronize_cookie(asy
 extern void async_synchronize_cookie_domain(async_cookie_t cookie,
 					    struct list_head *list);
 
+#endif /* _ASYNC_H_ */


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