diff options
Diffstat (limited to 'lib/locking-selftest.c')
| -rw-r--r-- | lib/locking-selftest.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c index 6f6a5fc85b42..6e0c019f71b6 100644 --- a/lib/locking-selftest.c +++ b/lib/locking-selftest.c @@ -2710,6 +2710,43 @@ static void local_lock_3B(void) } +#ifdef CONFIG_DEBUG_LOCK_ALLOC +static inline const char *rw_semaphore_lockdep_name(struct rw_semaphore *rwsem) +{ + return rwsem->dep_map.name; +} +#else +static inline const char *rw_semaphore_lockdep_name(struct rw_semaphore *rwsem) +{ + return NULL; +} +#endif + +static void test_lockdep_set_subclass_name(void) +{ + const char *name_before = rw_semaphore_lockdep_name(&rwsem_X1); + const char *name_after; + + lockdep_set_subclass(&rwsem_X1, 1); + name_after = rw_semaphore_lockdep_name(&rwsem_X1); + DEBUG_LOCKS_WARN_ON(name_before != name_after); +} + +/* + * lockdep_set_subclass() should reuse the existing lock class name instead + * of creating a new one. + */ +static void lockdep_set_subclass_name_test(void) +{ + printk(" --------------------------------------------------------------------------\n"); + printk(" | lockdep_set_subclass() name test|\n"); + printk(" -----------------------------------\n"); + + print_testname("compare name before and after"); + dotest(test_lockdep_set_subclass_name, SUCCESS, LOCKTYPE_RWSEM); + pr_cont("\n"); +} + static void local_lock_tests(void) { printk(" --------------------------------------------------------------------------\n"); @@ -2920,6 +2957,8 @@ void locking_selftest(void) dotest(hardirq_deadlock_softirq_not_deadlock, FAILURE, LOCKTYPE_SPECIAL); pr_cont("\n"); + lockdep_set_subclass_name_test(); + if (unexpected_testcase_failures) { printk("-----------------------------------------------------------------\n"); debug_locks = 0; |