locking/lockdep: Mark local_lock_t
The local_lock_t's are special, because they cannot form IRQ
inversions, make sure we can tell them apart from the rest of the
locks.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index c1418b47..b061e29 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -1290,6 +1290,7 @@ register_lock_class(struct lockdep_map *lock, unsigned int subclass, int force)
class->name_version = count_matching_names(class);
class->wait_type_inner = lock->wait_type_inner;
class->wait_type_outer = lock->wait_type_outer;
+ class->lock_type = lock->lock_type;
/*
* We use RCU's safe list-add method to make
* parallel walking of the hash-list safe:
@@ -4503,9 +4504,9 @@ print_lock_invalid_wait_context(struct task_struct *curr,
*/
static int check_wait_context(struct task_struct *curr, struct held_lock *next)
{
- short next_inner = hlock_class(next)->wait_type_inner;
- short next_outer = hlock_class(next)->wait_type_outer;
- short curr_inner;
+ u8 next_inner = hlock_class(next)->wait_type_inner;
+ u8 next_outer = hlock_class(next)->wait_type_outer;
+ u8 curr_inner;
int depth;
if (!curr->lockdep_depth || !next_inner || next->trylock)
@@ -4528,7 +4529,7 @@ static int check_wait_context(struct task_struct *curr, struct held_lock *next)
for (; depth < curr->lockdep_depth; depth++) {
struct held_lock *prev = curr->held_locks + depth;
- short prev_inner = hlock_class(prev)->wait_type_inner;
+ u8 prev_inner = hlock_class(prev)->wait_type_inner;
if (prev_inner) {
/*
@@ -4577,9 +4578,9 @@ static inline int check_wait_context(struct task_struct *curr,
/*
* Initialize a lock instance's lock-class mapping info:
*/
-void lockdep_init_map_waits(struct lockdep_map *lock, const char *name,
+void lockdep_init_map_type(struct lockdep_map *lock, const char *name,
struct lock_class_key *key, int subclass,
- short inner, short outer)
+ u8 inner, u8 outer, u8 lock_type)
{
int i;
@@ -4602,6 +4603,7 @@ void lockdep_init_map_waits(struct lockdep_map *lock, const char *name,
lock->wait_type_outer = outer;
lock->wait_type_inner = inner;
+ lock->lock_type = lock_type;
/*
* No key, no joy, we need to hash something.
@@ -4636,7 +4638,7 @@ void lockdep_init_map_waits(struct lockdep_map *lock, const char *name,
raw_local_irq_restore(flags);
}
}
-EXPORT_SYMBOL_GPL(lockdep_init_map_waits);
+EXPORT_SYMBOL_GPL(lockdep_init_map_type);
struct lock_class_key __lockdep_no_validate__;
EXPORT_SYMBOL_GPL(__lockdep_no_validate__);
