[RFC,v6,04/21] dept: Apply Dept to mutex families

Commit Message

Byungchul Park May 4, 2022, 8:17 a.m. UTC

Makes Dept able to track dependencies by mutex families.

Signed-off-by: Byungchul Park <[e-mail]>
---
 include/linux/lockdep.h | 18 +++++++++++++++---
 include/linux/mutex.h   | 22 ++++++++++++++++++++++
 include/linux/rtmutex.h |  1 +
 3 files changed, 38 insertions(+), 3 deletions(-)

Patch

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 4fa91d5..99569acb 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -603,9 +603,21 @@  static inline void print_irqtrace_events(struct task_struct *curr)
 #define seqcount_acquire_read(l, s, t, i)	lock_acquire_shared_recursive(l, s, t, NULL, i)
 #define seqcount_release(l, i)			lock_release(l, i)
 
-#define mutex_acquire(l, s, t, i)		lock_acquire_exclusive(l, s, t, NULL, i)
-#define mutex_acquire_nest(l, s, t, n, i)	lock_acquire_exclusive(l, s, t, n, i)
-#define mutex_release(l, i)			lock_release(l, i)
+#define mutex_acquire(l, s, t, i)					\
+do {									\
+	lock_acquire_exclusive(l, s, t, NULL, i);			\
+	dept_mutex_lock(&(l)->dmap, s, t, NULL, "mutex_unlock", i);	\
+} while (0)
+#define mutex_acquire_nest(l, s, t, n, i)				\
+do {									\
+	lock_acquire_exclusive(l, s, t, n, i);				\
+	dept_mutex_lock(&(l)->dmap, s, t, (n) ? &(n)->dmap : NULL, "mutex_unlock", i);\
+} while (0)
+#define mutex_release(l, i)						\
+do {									\
+	lock_release(l, i);						\
+	dept_mutex_unlock(&(l)->dmap, i);				\
+} while (0)
 
 #define rwsem_acquire(l, s, t, i)		lock_acquire_exclusive(l, s, t, NULL, i)
 #define rwsem_acquire_nest(l, s, t, n, i)	lock_acquire_exclusive(l, s, t, n, i)
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 8f226d4..b699cf41 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -25,6 +25,7 @@ 
 		, .dep_map = {					\
 			.name = #lockname,			\
 			.wait_type_inner = LD_WAIT_SLEEP,	\
+			.dmap = DEPT_MAP_INITIALIZER(lockname)	\
 		}
 #else
 # define __DEP_MAP_MUTEX_INITIALIZER(lockname)
@@ -75,6 +76,27 @@  struct mutex {
 #endif
 };
 
+#ifdef CONFIG_DEPT
+#define dept_mutex_lock(m, ne, t, n, e_fn, ip)				\
+do {									\
+	if (t) {							\
+		dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne);	\
+	} else if (n) {							\
+		dept_ecxt_enter_nokeep(m);				\
+	} else {							\
+		dept_wait(m, 1UL, ip, __func__, ne);			\
+		dept_ecxt_enter(m, 1UL, ip, __func__, e_fn, ne);	\
+	}								\
+} while (0)
+#define dept_mutex_unlock(m, ip)					\
+do {									\
+	dept_ecxt_exit(m, 1UL, ip);					\
+} while (0)
+#else
+#define dept_mutex_lock(m, ne, t, n, e_fn, ip)	do { } while (0)
+#define dept_mutex_unlock(m, ip)		do { } while (0)
+#endif
+
 #ifdef CONFIG_DEBUG_MUTEXES
 
 #define __DEBUG_MUTEX_INITIALIZER(lockname)				\
diff --git a/include/linux/rtmutex.h b/include/linux/rtmutex.h
index 7d04988..416064d 100644
--- a/include/linux/rtmutex.h
+++ b/include/linux/rtmutex.h
@@ -81,6 +81,7 @@  static inline void rt_mutex_debug_task_free(struct task_struct *tsk) { }
 	.dep_map = {					\
 		.name = #mutexname,			\
 		.wait_type_inner = LD_WAIT_SLEEP,	\
+		.dmap = DEPT_MAP_INITIALIZER(mutexname)	\
 	}
 #else
 #define __DEP_MAP_RT_MUTEX_INITIALIZER(mutexname)