[RESEND PATCH v10 07/25] dept: Apply sdt_might_sleep_{start, end}() to wait_for_completion()/complete()

[Byungchul Park]

Makes Dept able to track dependencies by
wait_for_completion()/complete().

Signed-off-by: Byungchul Park <byungc...@sk.com>
---
 include/linux/completion.h | 30 +++++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

diff --git a/include/linux/completion.h b/include/linux/completion.h
index 62b32b19e0a8..32d535abebf3 100644
--- a/include/linux/completion.h
+++ b/include/linux/completion.h
@@ -10,6 +10,7 @@
  */
 
 #include <linux/swait.h>
+#include <linux/dept_sdt.h>
 
 /*
  * struct completion - structure used to maintain state for a "completion"
@@ -26,14 +27,33 @@
 struct completion {
        unsigned int done;
        struct swait_queue_head wait;
+       struct dept_map dmap;
 };
 
+#define init_completion(x)                             \
+do {                                                   \
+       sdt_map_init(&(x)->dmap);                       \
+       __init_completion(x);                           \
+} while (0)
+
+/*
+ * XXX: No use cases for now. Fill the body when needed.
+ */
 #define init_completion_map(x, m) init_completion(x)
-static inline void complete_acquire(struct completion *x) {}
-static inline void complete_release(struct completion *x) {}
+
+static inline void complete_acquire(struct completion *x)
+{
+       sdt_might_sleep_start(&x->dmap);
+}
+
+static inline void complete_release(struct completion *x)
+{
+       sdt_might_sleep_end();
+}
 
 #define COMPLETION_INITIALIZER(work) \
-       { 0, __SWAIT_QUEUE_HEAD_INITIALIZER((work).wait) }
+       { 0, __SWAIT_QUEUE_HEAD_INITIALIZER((work).wait), \
+         .dmap = DEPT_MAP_INITIALIZER(work, NULL), }
 
 #define COMPLETION_INITIALIZER_ONSTACK_MAP(work, map) \
        (*({ init_completion_map(&(work), &(map)); &(work); }))
@@ -75,13 +95,13 @@ static inline void complete_release(struct completion *x) {}
 #endif
 
 /**
- * init_completion - Initialize a dynamically allocated completion
+ * __init_completion - Initialize a dynamically allocated completion
  * @x:  pointer to completion structure that is to be initialized
  *
  * This inline function will initialize a dynamically created completion
  * structure.
  */
-static inline void init_completion(struct completion *x)
+static inline void __init_completion(struct completion *x)
 {
        x->done = 0;
        init_swait_queue_head(&x->wait);
-- 
2.17.1