cgroup-defs: fix swork_event declare issue
The struct swork_event defined in work-simple.h which doesn't included before
it was used in cgroup-defs.h file. That cause a compiler error:
include/linux/cgroup-defs.h:144:21: error: field 'destroy_swork' has incomplete type
add this head file and remove compiler issue.
Signed-off-by: Alex Shi <alex.shi@linaro.org>
diff --git a/include/linux/cgroup-defs.h b/include/linux/cgroup-defs.h
index 2f57332..84a4cb3 100644
--- a/include/linux/cgroup-defs.h
+++ b/include/linux/cgroup-defs.h
@@ -16,6 +16,7 @@
#include <linux/percpu-refcount.h>
#include <linux/percpu-rwsem.h>
#include <linux/workqueue.h>
+#include <linux/work-simple.h>
#ifdef CONFIG_CGROUPS