Merge branch 'core-mutexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull WW mutex support from Ingo Molnar:
 "This tree adds support for wound/wait style locks, which the graphics
  guys would like to make use of in the TTM graphics subsystem.

  Wound/wait mutexes are used when other multiple lock acquisitions of a
  similar type can be done in an arbitrary order.  The deadlock handling
  used here is called wait/wound in the RDBMS literature: The older
  tasks waits until it can acquire the contended lock.  The younger
  tasks needs to back off and drop all the locks it is currently
  holding, ie the younger task is wounded.

  See this LWN.net description of W/W mutexes:

     https://lwn.net/Articles/548909/

  The comments there outline specific usecases for this facility (which
  have already been implemented for the DRM tree).

  Also see Documentation/ww-mutex-design.txt for more details"

* 'core-mutexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking-selftests: Handle unexpected failures more strictly
  mutex: Add more w/w tests to test EDEADLK path handling
  mutex: Add more tests to lib/locking-selftest.c
  mutex: Add w/w tests to lib/locking-selftest.c
  mutex: Add w/w mutex slowpath debugging
  mutex: Add support for wound/wait style locks
  arch: Make __mutex_fastpath_lock_retval return whether fastpath succeeded or not

3 files changed, 717 insertions, 18 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 566cf2b..7154f79 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -547,6 +547,19 @@ config DEBUG_MUTEXES
 	 This feature allows mutex semantics violations to be detected and
 	 reported.
 
+config DEBUG_WW_MUTEX_SLOWPATH
+	bool "Wait/wound mutex debugging: Slowpath testing"
+	depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
+	select DEBUG_LOCK_ALLOC
+	select DEBUG_SPINLOCK
+	select DEBUG_MUTEXES
+	help
+	 This feature enables slowpath testing for w/w mutex users by
+	 injecting additional -EDEADLK wound/backoff cases. Together with
+	 the full mutex checks enabled with (CONFIG_PROVE_LOCKING) this
+	 will test all possible w/w mutex interface abuse with the
+	 exception of simply not acquiring all the required locks.
+
 config DEBUG_LOCK_ALLOC
 	bool "Lock debugging: detect incorrect freeing of live locks"
 	depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
diff --git a/lib/debug_locks.c b/lib/debug_locks.c
index f2fa60c..96c4c63 100644
--- a/lib/debug_locks.c
+++ b/lib/debug_locks.c
@@ -30,6 +30,7 @@ EXPORT_SYMBOL_GPL(debug_locks);
  * a locking bug is detected.
  */
 int debug_locks_silent;
+EXPORT_SYMBOL_GPL(debug_locks_silent);
 
 /*
  * Generic 'turn off all lock debugging' function:
@@ -44,3 +45,4 @@ int debug_locks_off(void)
 	}
 	return 0;
 }
+EXPORT_SYMBOL_GPL(debug_locks_off);
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index c3eb261..aad024d 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -26,6 +26,8 @@
  */
 static unsigned int debug_locks_verbose;
 
+static DEFINE_WW_CLASS(ww_lockdep);
+
 static int __init setup_debug_locks_verbose(char *str)
 {
 	get_option(&str, &debug_locks_verbose);
@@ -42,6 +44,10 @@ __setup("debug_locks_verbose=", setup_debug_locks_verbose);
 #define LOCKTYPE_RWLOCK	0x2
 #define LOCKTYPE_MUTEX	0x4
 #define LOCKTYPE_RWSEM	0x8
+#define LOCKTYPE_WW	0x10
+
+static struct ww_acquire_ctx t, t2;
+static struct ww_mutex o, o2, o3;
 
 /*
  * Normal standalone locks, for the circular and irq-context
@@ -193,6 +199,20 @@ static void init_shared_classes(void)
 #define RSU(x)			up_read(&rwsem_##x)
 #define RWSI(x)			init_rwsem(&rwsem_##x)
 
+#ifndef CONFIG_DEBUG_WW_MUTEX_SLOWPATH
+#define WWAI(x)			ww_acquire_init(x, &ww_lockdep)
+#else
+#define WWAI(x)			do { ww_acquire_init(x, &ww_lockdep); (x)->deadlock_inject_countdown = ~0U; } while (0)
+#endif
+#define WWAD(x)			ww_acquire_done(x)
+#define WWAF(x)			ww_acquire_fini(x)
+
+#define WWL(x, c)		ww_mutex_lock(x, c)
+#define WWT(x)			ww_mutex_trylock(x)
+#define WWL1(x)			ww_mutex_lock(x, NULL)
+#define WWU(x)			ww_mutex_unlock(x)
+
+
 #define LOCK_UNLOCK_2(x,y)	LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x)
 
 /*
@@ -894,11 +914,13 @@ GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
 # define I_RWLOCK(x)	lockdep_reset_lock(&rwlock_##x.dep_map)
 # define I_MUTEX(x)	lockdep_reset_lock(&mutex_##x.dep_map)
 # define I_RWSEM(x)	lockdep_reset_lock(&rwsem_##x.dep_map)
+# define I_WW(x)	lockdep_reset_lock(&x.dep_map)
 #else
 # define I_SPINLOCK(x)
 # define I_RWLOCK(x)
 # define I_MUTEX(x)
 # define I_RWSEM(x)
+# define I_WW(x)
 #endif
 
 #define I1(x)					\
@@ -920,11 +942,20 @@ GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
 static void reset_locks(void)
 {
 	local_irq_disable();
+	lockdep_free_key_range(&ww_lockdep.acquire_key, 1);
+	lockdep_free_key_range(&ww_lockdep.mutex_key, 1);
+
 	I1(A); I1(B); I1(C); I1(D);
 	I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2);
+	I_WW(t); I_WW(t2); I_WW(o.base); I_WW(o2.base); I_WW(o3.base);
 	lockdep_reset();
 	I2(A); I2(B); I2(C); I2(D);
 	init_shared_classes();
+
+	ww_mutex_init(&o, &ww_lockdep); ww_mutex_init(&o2, &ww_lockdep); ww_mutex_init(&o3, &ww_lockdep);
+	memset(&t, 0, sizeof(t)); memset(&t2, 0, sizeof(t2));
+	memset(&ww_lockdep.acquire_key, 0, sizeof(ww_lockdep.acquire_key));
+	memset(&ww_lockdep.mutex_key, 0, sizeof(ww_lockdep.mutex_key));
 	local_irq_enable();
 }
 
@@ -938,7 +969,6 @@ static int unexpected_testcase_failures;
 static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
 {
 	unsigned long saved_preempt_count = preempt_count();
-	int expected_failure = 0;
 
 	WARN_ON(irqs_disabled());
 
@@ -947,25 +977,17 @@ static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
 	 * Filter out expected failures:
 	 */
 #ifndef CONFIG_PROVE_LOCKING
-	if ((lockclass_mask & LOCKTYPE_SPIN) && debug_locks != expected)
-		expected_failure = 1;
-	if ((lockclass_mask & LOCKTYPE_RWLOCK) && debug_locks != expected)
-		expected_failure = 1;
-	if ((lockclass_mask & LOCKTYPE_MUTEX) && debug_locks != expected)
-		expected_failure = 1;
-	if ((lockclass_mask & LOCKTYPE_RWSEM) && debug_locks != expected)
-		expected_failure = 1;
+	if (expected == FAILURE && debug_locks) {
+		expected_testcase_failures++;
+		printk("failed|");
+	}
+	else
 #endif
 	if (debug_locks != expected) {
-		if (expected_failure) {
-			expected_testcase_failures++;
-			printk("failed|");
-		} else {
-			unexpected_testcase_failures++;
-
-			printk("FAILED|");
-			dump_stack();
-		}
+		unexpected_testcase_failures++;
+		printk("FAILED|");
+
+		dump_stack();
 	} else {
 		testcase_successes++;
 		printk("  ok  |");
@@ -1108,6 +1130,666 @@ static inline void print_testname(const char *testname)
 	DO_TESTCASE_6IRW(desc, name, 312);			\
 	DO_TESTCASE_6IRW(desc, name, 321);
 
+static void ww_test_fail_acquire(void)
+{
+	int ret;
+
+	WWAI(&t);
+	t.stamp++;
+
+	ret = WWL(&o, &t);
+
+	if (WARN_ON(!o.ctx) ||
+	    WARN_ON(ret))
+		return;
+
+	/* No lockdep test, pure API */
+	ret = WWL(&o, &t);
+	WARN_ON(ret != -EALREADY);
+
+	ret = WWT(&o);
+	WARN_ON(ret);
+
+	t2 = t;
+	t2.stamp++;
+	ret = WWL(&o, &t2);
+	WARN_ON(ret != -EDEADLK);
+	WWU(&o);
+
+	if (WWT(&o))
+		WWU(&o);
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+	else
+		DEBUG_LOCKS_WARN_ON(1);
+#endif
+}
+
+static void ww_test_normal(void)
+{
+	int ret;
+
+	WWAI(&t);
+
+	/*
+	 * None of the ww_mutex codepaths should be taken in the 'normal'
+	 * mutex calls. The easiest way to verify this is by using the
+	 * normal mutex calls, and making sure o.ctx is unmodified.
+	 */
+
+	/* mutex_lock (and indirectly, mutex_lock_nested) */
+	o.ctx = (void *)~0UL;
+	mutex_lock(&o.base);
+	mutex_unlock(&o.base);
+	WARN_ON(o.ctx != (void *)~0UL);
+
+	/* mutex_lock_interruptible (and *_nested) */
+	o.ctx = (void *)~0UL;
+	ret = mutex_lock_interruptible(&o.base);
+	if (!ret)
+		mutex_unlock(&o.base);
+	else
+		WARN_ON(1);
+	WARN_ON(o.ctx != (void *)~0UL);
+
+	/* mutex_lock_killable (and *_nested) */
+	o.ctx = (void *)~0UL;
+	ret = mutex_lock_killable(&o.base);
+	if (!ret)
+		mutex_unlock(&o.base);
+	else
+		WARN_ON(1);
+	WARN_ON(o.ctx != (void *)~0UL);
+
+	/* trylock, succeeding */
+	o.ctx = (void *)~0UL;
+	ret = mutex_trylock(&o.base);
+	WARN_ON(!ret);
+	if (ret)
+		mutex_unlock(&o.base);
+	else
+		WARN_ON(1);
+	WARN_ON(o.ctx != (void *)~0UL);
+
+	/* trylock, failing */
+	o.ctx = (void *)~0UL;
+	mutex_lock(&o.base);
+	ret = mutex_trylock(&o.base);
+	WARN_ON(ret);
+	mutex_unlock(&o.base);
+	WARN_ON(o.ctx != (void *)~0UL);
+
+	/* nest_lock */
+	o.ctx = (void *)~0UL;
+	mutex_lock_nest_lock(&o.base, &t);
+	mutex_unlock(&o.base);
+	WARN_ON(o.ctx != (void *)~0UL);
+}
+
+static void ww_test_two_contexts(void)
+{
+	WWAI(&t);
+	WWAI(&t2);
+}
+
+static void ww_test_diff_class(void)
+{
+	WWAI(&t);
+#ifdef CONFIG_DEBUG_MUTEXES
+	t.ww_class = NULL;
+#endif
+	WWL(&o, &t);
+}
+
+static void ww_test_context_done_twice(void)
+{
+	WWAI(&t);
+	WWAD(&t);
+	WWAD(&t);
+	WWAF(&t);
+}
+
+static void ww_test_context_unlock_twice(void)
+{
+	WWAI(&t);
+	WWAD(&t);
+	WWAF(&t);
+	WWAF(&t);
+}
+
+static void ww_test_context_fini_early(void)
+{
+	WWAI(&t);
+	WWL(&o, &t);
+	WWAD(&t);
+	WWAF(&t);
+}
+
+static void ww_test_context_lock_after_done(void)
+{
+	WWAI(&t);
+	WWAD(&t);
+	WWL(&o, &t);
+}
+
+static void ww_test_object_unlock_twice(void)
+{
+	WWL1(&o);
+	WWU(&o);
+	WWU(&o);
+}
+
+static void ww_test_object_lock_unbalanced(void)
+{
+	WWAI(&t);
+	WWL(&o, &t);
+	t.acquired = 0;
+	WWU(&o);
+	WWAF(&t);
+}
+
+static void ww_test_object_lock_stale_context(void)
+{
+	WWAI(&t);
+	o.ctx = &t2;
+	WWL(&o, &t);
+}
+
+static void ww_test_edeadlk_normal(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	o2.ctx = &t2;
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+
+	o2.ctx = NULL;
+	mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
+	mutex_unlock(&o2.base);
+	WWU(&o);
+
+	WWL(&o2, &t);
+}
+
+static void ww_test_edeadlk_normal_slow(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+	o2.ctx = &t2;
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+
+	o2.ctx = NULL;
+	mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
+	mutex_unlock(&o2.base);
+	WWU(&o);
+
+	ww_mutex_lock_slow(&o2, &t);
+}
+
+static void ww_test_edeadlk_no_unlock(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	o2.ctx = &t2;
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+
+	o2.ctx = NULL;
+	mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
+	mutex_unlock(&o2.base);
+
+	WWL(&o2, &t);
+}
+
+static void ww_test_edeadlk_no_unlock_slow(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+	o2.ctx = &t2;
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+
+	o2.ctx = NULL;
+	mutex_acquire(&o2.base.dep_map, 0, 1, _THIS_IP_);
+	mutex_unlock(&o2.base);
+
+	ww_mutex_lock_slow(&o2, &t);
+}
+
+static void ww_test_edeadlk_acquire_more(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+	o2.ctx = &t2;
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+
+	ret = WWL(&o3, &t);
+}
+
+static void ww_test_edeadlk_acquire_more_slow(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+	o2.ctx = &t2;
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+
+	ww_mutex_lock_slow(&o3, &t);
+}
+
+static void ww_test_edeadlk_acquire_more_edeadlk(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+	o2.ctx = &t2;
+
+	mutex_lock(&o3.base);
+	mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
+	o3.ctx = &t2;
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+
+	ret = WWL(&o3, &t);
+	WARN_ON(ret != -EDEADLK);
+}
+
+static void ww_test_edeadlk_acquire_more_edeadlk_slow(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+	o2.ctx = &t2;
+
+	mutex_lock(&o3.base);
+	mutex_release(&o3.base.dep_map, 1, _THIS_IP_);
+	o3.ctx = &t2;
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+
+	ww_mutex_lock_slow(&o3, &t);
+}
+
+static void ww_test_edeadlk_acquire_wrong(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+	o2.ctx = &t2;
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+	if (!ret)
+		WWU(&o2);
+
+	WWU(&o);
+
+	ret = WWL(&o3, &t);
+}
+
+static void ww_test_edeadlk_acquire_wrong_slow(void)
+{
+	int ret;
+
+	mutex_lock(&o2.base);
+	mutex_release(&o2.base.dep_map, 1, _THIS_IP_);
+	o2.ctx = &t2;
+
+	WWAI(&t);
+	t2 = t;
+	t2.stamp--;
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret != -EDEADLK);
+	if (!ret)
+		WWU(&o2);
+
+	WWU(&o);
+
+	ww_mutex_lock_slow(&o3, &t);
+}
+
+static void ww_test_spin_nest_unlocked(void)
+{
+	raw_spin_lock_nest_lock(&lock_A, &o.base);
+	U(A);
+}
+
+static void ww_test_unneeded_slow(void)
+{
+	WWAI(&t);
+
+	ww_mutex_lock_slow(&o, &t);
+}
+
+static void ww_test_context_block(void)
+{
+	int ret;
+
+	WWAI(&t);
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+	WWL1(&o2);
+}
+
+static void ww_test_context_try(void)
+{
+	int ret;
+
+	WWAI(&t);
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWT(&o2);
+	WARN_ON(!ret);
+	WWU(&o2);
+	WWU(&o);
+}
+
+static void ww_test_context_context(void)
+{
+	int ret;
+
+	WWAI(&t);
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret);
+
+	WWU(&o2);
+	WWU(&o);
+}
+
+static void ww_test_try_block(void)
+{
+	bool ret;
+
+	ret = WWT(&o);
+	WARN_ON(!ret);
+
+	WWL1(&o2);
+	WWU(&o2);
+	WWU(&o);
+}
+
+static void ww_test_try_try(void)
+{
+	bool ret;
+
+	ret = WWT(&o);
+	WARN_ON(!ret);
+	ret = WWT(&o2);
+	WARN_ON(!ret);
+	WWU(&o2);
+	WWU(&o);
+}
+
+static void ww_test_try_context(void)
+{
+	int ret;
+
+	ret = WWT(&o);
+	WARN_ON(!ret);
+
+	WWAI(&t);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret);
+}
+
+static void ww_test_block_block(void)
+{
+	WWL1(&o);
+	WWL1(&o2);
+}
+
+static void ww_test_block_try(void)
+{
+	bool ret;
+
+	WWL1(&o);
+	ret = WWT(&o2);
+	WARN_ON(!ret);
+}
+
+static void ww_test_block_context(void)
+{
+	int ret;
+
+	WWL1(&o);
+	WWAI(&t);
+
+	ret = WWL(&o2, &t);
+	WARN_ON(ret);
+}
+
+static void ww_test_spin_block(void)
+{
+	L(A);
+	U(A);
+
+	WWL1(&o);
+	L(A);
+	U(A);
+	WWU(&o);
+
+	L(A);
+	WWL1(&o);
+	WWU(&o);
+	U(A);
+}
+
+static void ww_test_spin_try(void)
+{
+	bool ret;
+
+	L(A);
+	U(A);
+
+	ret = WWT(&o);
+	WARN_ON(!ret);
+	L(A);
+	U(A);
+	WWU(&o);
+
+	L(A);
+	ret = WWT(&o);
+	WARN_ON(!ret);
+	WWU(&o);
+	U(A);
+}
+
+static void ww_test_spin_context(void)
+{
+	int ret;
+
+	L(A);
+	U(A);
+
+	WWAI(&t);
+
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+	L(A);
+	U(A);
+	WWU(&o);
+
+	L(A);
+	ret = WWL(&o, &t);
+	WARN_ON(ret);
+	WWU(&o);
+	U(A);
+}
+
+static void ww_tests(void)
+{
+	printk("  --------------------------------------------------------------------------\n");
+	printk("  | Wound/wait tests |\n");
+	printk("  ---------------------\n");
+
+	print_testname("ww api failures");
+	dotest(ww_test_fail_acquire, SUCCESS, LOCKTYPE_WW);
+	dotest(ww_test_normal, SUCCESS, LOCKTYPE_WW);
+	dotest(ww_test_unneeded_slow, FAILURE, LOCKTYPE_WW);
+	printk("\n");
+
+	print_testname("ww contexts mixing");
+	dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW);
+	printk("\n");
+
+	print_testname("finishing ww context");
+	dotest(ww_test_context_done_twice, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_context_unlock_twice, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_context_fini_early, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_context_lock_after_done, FAILURE, LOCKTYPE_WW);
+	printk("\n");
+
+	print_testname("locking mismatches");
+	dotest(ww_test_object_unlock_twice, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_object_lock_unbalanced, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_object_lock_stale_context, FAILURE, LOCKTYPE_WW);
+	printk("\n");
+
+	print_testname("EDEADLK handling");
+	dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW);
+	dotest(ww_test_edeadlk_normal_slow, SUCCESS, LOCKTYPE_WW);
+	dotest(ww_test_edeadlk_no_unlock, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_edeadlk_no_unlock_slow, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_edeadlk_acquire_more, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_edeadlk_acquire_more_slow, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_edeadlk_acquire_more_edeadlk, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_edeadlk_acquire_more_edeadlk_slow, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_edeadlk_acquire_wrong, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_edeadlk_acquire_wrong_slow, FAILURE, LOCKTYPE_WW);
+	printk("\n");
+
+	print_testname("spinlock nest unlocked");
+	dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW);
+	printk("\n");
+
+	printk("  -----------------------------------------------------\n");
+	printk("                                 |block | try  |context|\n");
+	printk("  -----------------------------------------------------\n");
+
+	print_testname("context");
+	dotest(ww_test_context_block, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_context_try, SUCCESS, LOCKTYPE_WW);
+	dotest(ww_test_context_context, SUCCESS, LOCKTYPE_WW);
+	printk("\n");
+
+	print_testname("try");
+	dotest(ww_test_try_block, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_try_try, SUCCESS, LOCKTYPE_WW);
+	dotest(ww_test_try_context, FAILURE, LOCKTYPE_WW);
+	printk("\n");
+
+	print_testname("block");
+	dotest(ww_test_block_block, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_block_try, SUCCESS, LOCKTYPE_WW);
+	dotest(ww_test_block_context, FAILURE, LOCKTYPE_WW);
+	printk("\n");
+
+	print_testname("spinlock");
+	dotest(ww_test_spin_block, FAILURE, LOCKTYPE_WW);
+	dotest(ww_test_spin_try, SUCCESS, LOCKTYPE_WW);
+	dotest(ww_test_spin_context, FAILURE, LOCKTYPE_WW);
+	printk("\n");
+}
 
 void locking_selftest(void)
 {
@@ -1188,6 +1870,8 @@ void locking_selftest(void)
 	DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion);
 //	DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2);
 
+	ww_tests();
+
 	if (unexpected_testcase_failures) {
 		printk("-----------------------------------------------------------------\n");
 		debug_locks = 0;