edac,rcu: use synchronize_rcu() instead of call_rcu()+rcu_barrier()
synchronize_rcu() does the stuff as needed.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Doug Thompson <dougthompson@xmission.com>
Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/edac/edac_device.c b/drivers/edac/edac_device.c
index a7408cf..c3f6743 100644
--- a/drivers/edac/edac_device.c
+++ b/drivers/edac/edac_device.c
@@ -346,30 +346,18 @@
}
/*
- * complete_edac_device_list_del
- *
- * callback function when reference count is zero
- */
-static void complete_edac_device_list_del(struct rcu_head *head)
-{
- struct edac_device_ctl_info *edac_dev;
-
- edac_dev = container_of(head, struct edac_device_ctl_info, rcu);
- INIT_LIST_HEAD(&edac_dev->link);
-}
-
-/*
* del_edac_device_from_global_list
- *
- * remove the RCU, setup for a callback call,
- * then wait for the callback to occur
*/
static void del_edac_device_from_global_list(struct edac_device_ctl_info
*edac_device)
{
list_del_rcu(&edac_device->link);
- call_rcu(&edac_device->rcu, complete_edac_device_list_del);
- rcu_barrier();
+
+ /* these are for safe removal of devices from global list while
+ * NMI handlers may be traversing list
+ */
+ synchronize_rcu();
+ INIT_LIST_HEAD(&edac_device->link);
}
/*