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

Byungchul Park
2022-05-04T08:49:54Z

Makes Dept able to track dependencies by mutex families.

Signed-off-by: Byungchul Park <byungchul.park@lge.com>
---
include/linux/lockdep.h | 18 +++++++++++++++---
include/linux/mutex.h | 22 ++++++++++++++++++++++
include/linux/rtmutex.h | 1 +
3 files changed, 38 insertions(+), 3 deletions(-)

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)
--
1.9.1