linux-kernel - PM / Wakeup: remove useless synchronize

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Date:	Wed, 11 May 2011 22:15:59 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	David Miller <davem@...emloft.net>
Subject: PM / Wakeup: remove useless synchronize_rcu() call

wakeup_source_add() adds an item into wakeup_sources list.

There is no need to call synchronize_rcu() at this point.

Its only needed in wakeup_source_remove()

Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
CC: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
CC: David Miller <davem@...emloft.net>,
CC: Greg Kroah-Hartman <gregkh@...e.de>
---
 drivers/base/power/wakeup.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index abbbd33..84f7c7d 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -110,7 +110,6 @@ void wakeup_source_add(struct wakeup_source *ws)
 	spin_lock_irq(&events_lock);
 	list_add_rcu(&ws->entry, &wakeup_sources);
 	spin_unlock_irq(&events_lock);
-	synchronize_rcu();
 }
 EXPORT_SYMBOL_GPL(wakeup_source_add);
 


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