[PATCH RFC v6 03/21] dept: Apply Dept to spinlock

Byungchul Park
2022-05-04T08:49:52Z

Makes Dept able to track dependencies by spinlock.

Signed-off-by: Byungchul Park <byungchul.park@lge.com>
---
include/linux/lockdep.h | 18 +++++++++++++++---
include/linux/spinlock.h | 21 +++++++++++++++++++++
include/linux/spinlock_types_raw.h | 3 +++
3 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index aee4660..4fa91d5 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -572,9 +572,21 @@ static inline void print_irqtrace_events(struct task_struct *curr)
#define lock_acquire_shared(l, s, t, n, i) lock_acquire(l, s, t, 1, 1, n, i)
#define lock_acquire_shared_recursive(l, s, t, n, i) lock_acquire(l, s, t, 2, 1, n, i)

-#define spin_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
-#define spin_acquire_nest(l, s, t, n, i) lock_acquire_exclusive(l, s, t, n, i)
-#define spin_release(l, i) lock_release(l, i)
+#define spin_acquire(l, s, t, i) \
+do { \
+ lock_acquire_exclusive(l, s, t, NULL, i); \
+ dept_spin_lock(&(l)->dmap, s, t, NULL, "spin_unlock", i); \
+} while (0)
+#define spin_acquire_nest(l, s, t, n, i) \
+do { \
+ lock_acquire_exclusive(l, s, t, n, i); \
+ dept_spin_lock(&(l)->dmap, s, t, (n) ? &(n)->dmap : NULL, "spin_unlock", i); \
+} while (0)
+#define spin_release(l, i) \
+do { \
+ lock_release(l, i); \
+ dept_spin_unlock(&(l)->dmap, i); \
+} while (0)

#define rwlock_acquire(l, s, t, i) lock_acquire_exclusive(l, s, t, NULL, i)
#define rwlock_acquire_read(l, s, t, i) \
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 5c0c517..191fb99 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -95,6 +95,27 @@
# include <linux/spinlock_up.h>
#endif

+#ifdef CONFIG_DEPT
+#define dept_spin_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_spin_unlock(m, ip) \
+do { \
+ dept_ecxt_exit(m, 1UL, ip); \
+} while (0)
+#else
+#define dept_spin_lock(m, ne, t, n, e_fn, ip) do { } while (0)
+#define dept_spin_unlock(m, ip) do { } while (0)
+#endif
+
#ifdef CONFIG_DEBUG_SPINLOCK
extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,
struct lock_class_key *key, short inner);
diff --git a/include/linux/spinlock_types_raw.h b/include/linux/spinlock_types_raw.h
index 91cb36b..1a1da54 100644
--- a/include/linux/spinlock_types_raw.h
+++ b/include/linux/spinlock_types_raw.h
@@ -31,11 +31,13 @@
.dep_map = { \
.name = #lockname, \
.wait_type_inner = LD_WAIT_SPIN, \
+ .dmap = DEPT_MAP_INITIALIZER(lockname) \
}
# define SPIN_DEP_MAP_INIT(lockname) \
.dep_map = { \
.name = #lockname, \
.wait_type_inner = LD_WAIT_CONFIG, \
+ .dmap = DEPT_MAP_INITIALIZER(lockname) \
}

# define LOCAL_SPIN_DEP_MAP_INIT(lockname) \
@@ -43,6 +45,7 @@
.name = #lockname, \
.wait_type_inner = LD_WAIT_CONFIG, \
.lock_type = LD_LOCK_PERCPU, \
+ .dmap = DEPT_MAP_INITIALIZER(lockname) \
}
#else
# define RAW_SPIN_DEP_MAP_INIT(lockname)
--
1.9.1