Commit 9cdb8520 authored Mar 23, 2014 by Monam Agarwal Committed by Mike Snitzer Mar 27, 2014

dm: use RCU_INIT_POINTER instead of rcu_assign_pointer in __unbind



Replace rcu_assign_pointer(p, NULL) with RCU_INIT_POINTER(p, 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@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

parent bfc6d41c

drivers/md/dm.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2163,7 +2163,7 @@ 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;