return addr >= start && addr < start + size;
}
+static void __lockdep_free_key_range(void *start, unsigned long size)
+{
+ struct lock_class *class;
+ struct hlist_head *head;
+ int i;
+
+ /* Unhash all classes that were created by a module. */
+ for (i = 0; i < CLASSHASH_SIZE; i++) {
+ head = classhash_table + i;
+ hlist_for_each_entry_rcu(class, head, hash_entry) {
+ if (!within(class->key, start, size) &&
+ !within(class->name, start, size))
+ continue;
+ zap_class(class);
+ }
+ }
+}
+
/*
* Used in module.c to remove lock classes from memory that is going to be
* freed; and possibly re-used by other modules.
*/
void lockdep_free_key_range(void *start, unsigned long size)
{
- struct lock_class *class;
- struct hlist_head *head;
unsigned long flags;
- int i;
int locked;
init_data_structures_once();
raw_local_irq_save(flags);
locked = graph_lock();
-
- /*
- * Unhash all classes that were created by this module:
- */
- for (i = 0; i < CLASSHASH_SIZE; i++) {
- head = classhash_table + i;
- hlist_for_each_entry_rcu(class, head, hash_entry) {
- if (within(class->key, start, size))
- zap_class(class);
- else if (within(class->name, start, size))
- zap_class(class);
- }
- }
-
+ __lockdep_free_key_range(start, size);
if (locked)
graph_unlock();
raw_local_irq_restore(flags);
return false;
}
-void lockdep_reset_lock(struct lockdep_map *lock)
+/* The caller must hold the graph lock. Does not sleep. */
+static void __lockdep_reset_lock(struct lockdep_map *lock)
{
struct lock_class *class;
- unsigned long flags;
- int j, locked;
-
- init_data_structures_once();
-
- raw_local_irq_save(flags);
- locked = graph_lock();
+ int j;
/*
* Remove all classes this lock might have:
* Debug check: in the end all mapped classes should
* be gone.
*/
- if (unlikely(lock_class_cache_is_registered(lock))) {
- if (debug_locks_off_graph_unlock()) {
- /*
- * We all just reset everything, how did it match?
- */
- WARN_ON(1);
- }
- goto out_restore;
- }
+ if (WARN_ON_ONCE(lock_class_cache_is_registered(lock)))
+ debug_locks_off();
+}
+
+void lockdep_reset_lock(struct lockdep_map *lock)
+{
+ unsigned long flags;
+ int locked;
+
+ init_data_structures_once();
+
+ raw_local_irq_save(flags);
+ locked = graph_lock();
+ __lockdep_reset_lock(lock);
if (locked)
graph_unlock();
-
-out_restore:
raw_local_irq_restore(flags);
}