[dm-devel] [PATCH] drivers/md: Use RCU_INIT_POINTER(x, NULL) in dm.c
Monam Agarwal
monamagarwal123 at gmail.com
Sun Mar 23 18:28:27 UTC 2014
This patch replaces rcu_assign_pointer(x, NULL) with RCU_INIT_POINTER(x, NULL)
The rcu_assign_pointer() ensures that the initialization of a structure
is carried out before storing a pointer to that structure.
And in the case of the NULL pointer, there is no structure to initialize.
So, rcu_assign_pointer(p, NULL) can be safely converted to RCU_INIT_POINTER(p, NULL)
Signed-off-by: Monam Agarwal <monamagarwal123 at gmail.com>
---
drivers/md/dm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 8c53b09..804412a 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2172,7 +2172,7 @@ static struct dm_table *__unbind(struct mapped_device *md)
return NULL;
dm_table_event_callback(map, NULL, NULL);
- rcu_assign_pointer(md->map, NULL);
+ RCU_INIT_POINTER(md->map, NULL);
dm_sync_table(md);
return map;
--
1.7.9.5
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