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

From: Greg Kroah-Hartman
Date: Tue Jun 16 2009 - 01:54:29 EST

From: Shaohua Li <shaohua.li@xxxxxxxxx>

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@xxxxxxxxx>
Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxx>
Cc: Dmitry Torokhov <dtor@xxxxxxx>
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
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)
+ async_synchronize_full();

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