#define COMPLETION_INITIALIZER(work) \
{ 0, __WAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
+#define COMPLETION_INITIALIZER_ONSTACK(work) \
+ ({ init_completion(&work); work; })
+
#define DECLARE_COMPLETION(work) \
struct completion work = COMPLETION_INITIALIZER(work)
+/*
+ * Lockdep needs to run a non-constant initializer for on-stack
+ * completions - so we use the _ONSTACK() variant for those that
+ * are on the kernel stack:
+ */
+#ifdef CONFIG_LOCKDEP
+# define DECLARE_COMPLETION_ONSTACK(work) \
+ struct completion work = COMPLETION_INITIALIZER_ONSTACK(work)
+#else
+# define DECLARE_COMPLETION_ONSTACK(work) DECLARE_COMPLETION(work)
+#endif
+
static inline void init_completion(struct completion *x)
{
x->done = 0;