linux-kernel - [PATCH 1/8] fix a build error when including linux/async.h in another header file

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Message-Id: <1247643515.26272.76.camel@rzhang-dt>
Date:	Wed, 15 Jul 2009 15:38:35 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-pm <linux-pm@...ts.linux-foundation.org>,
	linux-acpi <linux-acpi@...r.kernel.org>
Cc:	Len Brown <lenb@...nel.org>, Pavel Machek <pavel@...e.cz>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Van De Ven, Arjan" <arjan.van.de.ven@...el.com>,
	"Zhang, Rui" <rui.zhang@...el.com>
Subject: [PATCH 1/8] fix a build error when including linux/async.h in
	another header file


include/linux/async.h:16: error: redefinition of typedef ‘async_cookie_t’
include/linux/async.h:16: error: previous declaration of ‘async_cookie_t’ was here
include/linux/async.h:17: error: redefinition of typedef ‘async_func_ptr’
include/linux/async.h:17: error: previous declaration of ‘async_func_ptr’ 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@...el.com>
---
 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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