linux-kernel - [PATCH 13/64] driver core: synchronize device shutdown

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Date:	Mon, 15 Jun 2009 22:46:02 -0700
From:	Greg Kroah-Hartman <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org
Cc:	Shaohua Li <shaohua.li@...el.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Dmitry Torokhov <dtor@...l.ru>,
	James Bottomley <James.Bottomley@...senPartnership.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [PATCH 13/64] driver core: synchronize device shutdown

From: Shaohua Li <shaohua.li@...el.com>

A patch series to make .shutdown execute asynchronously.  Some drivers's
shutdown can take a lot of time.  The patches can help save some shutdown
time.  The patches use Arjan's async API.


This patch:

synchronize all tasks submitted by .shutdown

Signed-off-by: Shaohua Li <shaohua.li@...el.com>
Cc: Arjan van de Ven <arjan@...radead.org>
Cc: Dmitry Torokhov <dtor@...l.ru>
Cc: James Bottomley <James.Bottomley@...senPartnership.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/base/core.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 1977d4b..7e8576d 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -22,6 +22,7 @@
 #include <linux/kallsyms.h>
 #include <linux/semaphore.h>
 #include <linux/mutex.h>
+#include <linux/async.h>
 
 #include "base.h"
 #include "power/power.h"
@@ -1665,4 +1666,5 @@ void device_shutdown(void)
 	kobject_put(sysfs_dev_char_kobj);
 	kobject_put(sysfs_dev_block_kobj);
 	kobject_put(dev_kobj);
+	async_synchronize_full();
 }
-- 
1.6.3.2

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