[PATCH] xen: use sync_clear_bit instead of clear_bit

[Vladimir Murzin]

Signed-off-by: Vladimir Murzin <murzin.v at gmail.com>
---
 For those who whant to play with original issue [1]
 
 [1] http://www.gossamer-threads.com/lists/xen/devel/325613

 drivers/xen/events/events_fifo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/events/events_fifo.c b/drivers/xen/events/events_fifo.c
index 96109a9..91248d8 100644
--- a/drivers/xen/events/events_fifo.c
+++ b/drivers/xen/events/events_fifo.c
@@ -273,7 +273,7 @@ static void consume_one_event(unsigned cpu,
 	 * copy of the ready word.
 	 */
 	if (head == 0)
-		clear_bit(priority, BM(ready));
+		sync_clear_bit(priority, BM(ready));
 
 	if (sync_test_bit(EVTCHN_FIFO_PENDING, BM(word))
 	    && !sync_test_bit(EVTCHN_FIFO_MASKED, BM(word)))
-- 
1.8.3.2