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Message-ID: <20080110115631.GC26577@in.ibm.com>
Date: Thu, 10 Jan 2008 17:26:31 +0530
From: Ananth N Mavinakayanahalli <ananth@...ibm.com>
To: lkml <linux-kernel@...r.kernel.org>
Cc: akpm@...ux-foundation.org, mingo@...e.hu, ak@...e.de,
sam@...nborg.org, arjan@...ux.intel.com
Subject: [PATCH 2/7] Move locking-selftest to tests/
From: Ananth N Mavinakayanahalli <ananth@...ibm.com>
Move the locking-selftest infrastructure to tests/
Signed-off-by: Ananth N Mavinakayanahalli <ananth@...ibm.com>
---
lib/locking-selftest-hardirq.h | 9
lib/locking-selftest-mutex.h | 11
lib/locking-selftest-rlock-hardirq.h | 2
lib/locking-selftest-rlock-softirq.h | 2
lib/locking-selftest-rlock.h | 14
lib/locking-selftest-rsem.h | 14
lib/locking-selftest-softirq.h | 9
lib/locking-selftest-spin-hardirq.h | 2
lib/locking-selftest-spin-softirq.h | 2
lib/locking-selftest-spin.h | 11
lib/locking-selftest-wlock-hardirq.h | 2
lib/locking-selftest-wlock-softirq.h | 2
lib/locking-selftest-wlock.h | 14
lib/locking-selftest-wsem.h | 14
lib/locking-selftest.c | 1218 ---------------------------------
lib/Kconfig.debug | 11
lib/Makefile | 1
tests/Kconfig | 11
tests/Makefile | 2
tests/locking-selftest-hardirq.h | 9
tests/locking-selftest-mutex.h | 11
tests/locking-selftest-rlock-hardirq.h | 2
tests/locking-selftest-rlock-softirq.h | 2
tests/locking-selftest-rlock.h | 14
tests/locking-selftest-rsem.h | 14
tests/locking-selftest-softirq.h | 9
tests/locking-selftest-spin-hardirq.h | 2
tests/locking-selftest-spin-softirq.h | 2
tests/locking-selftest-spin.h | 11
tests/locking-selftest-wlock-hardirq.h | 2
tests/locking-selftest-wlock-softirq.h | 2
tests/locking-selftest-wlock.h | 14
tests/locking-selftest-wsem.h | 14
tests/locking-selftest.c | 1218 +++++++++++++++++++++++++++++++++
34 files changed, 1339 insertions(+), 1338 deletions(-)
Index: linux-2.6.24-rc6/lib/Makefile
===================================================================
--- linux-2.6.24-rc6.orig/lib/Makefile
+++ linux-2.6.24-rc6/lib/Makefile
@@ -25,7 +25,6 @@ lib-$(CONFIG_HOTPLUG) += kobject_uevent.
obj-$(CONFIG_GENERIC_IOMAP) += iomap.o
obj-$(CONFIG_HAS_IOMEM) += iomap_copy.o devres.o
obj-$(CONFIG_CHECK_SIGNATURE) += check_signature.o
-obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
obj-$(CONFIG_DEBUG_SPINLOCK) += spinlock_debug.o
lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
Index: linux-2.6.24-rc6/lib/locking-selftest-hardirq.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-hardirq.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#undef IRQ_DISABLE
-#undef IRQ_ENABLE
-#undef IRQ_ENTER
-#undef IRQ_EXIT
-
-#define IRQ_ENABLE HARDIRQ_ENABLE
-#define IRQ_DISABLE HARDIRQ_DISABLE
-#define IRQ_ENTER HARDIRQ_ENTER
-#define IRQ_EXIT HARDIRQ_EXIT
Index: linux-2.6.24-rc6/lib/locking-selftest-mutex.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-mutex.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#undef LOCK
-#define LOCK ML
-
-#undef UNLOCK
-#define UNLOCK MU
-
-#undef RLOCK
-#undef WLOCK
-
-#undef INIT
-#define INIT MI
Index: linux-2.6.24-rc6/lib/locking-selftest-rlock-hardirq.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-rlock-hardirq.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "locking-selftest-rlock.h"
-#include "locking-selftest-hardirq.h"
Index: linux-2.6.24-rc6/lib/locking-selftest-rlock-softirq.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-rlock-softirq.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "locking-selftest-rlock.h"
-#include "locking-selftest-softirq.h"
Index: linux-2.6.24-rc6/lib/locking-selftest-rlock.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-rlock.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#undef LOCK
-#define LOCK RL
-
-#undef UNLOCK
-#define UNLOCK RU
-
-#undef RLOCK
-#define RLOCK RL
-
-#undef WLOCK
-#define WLOCK WL
-
-#undef INIT
-#define INIT RWI
Index: linux-2.6.24-rc6/lib/locking-selftest-rsem.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-rsem.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#undef LOCK
-#define LOCK RSL
-
-#undef UNLOCK
-#define UNLOCK RSU
-
-#undef RLOCK
-#define RLOCK RSL
-
-#undef WLOCK
-#define WLOCK WSL
-
-#undef INIT
-#define INIT RWSI
Index: linux-2.6.24-rc6/lib/locking-selftest-softirq.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-softirq.h
+++ /dev/null
@@ -1,9 +0,0 @@
-#undef IRQ_DISABLE
-#undef IRQ_ENABLE
-#undef IRQ_ENTER
-#undef IRQ_EXIT
-
-#define IRQ_DISABLE SOFTIRQ_DISABLE
-#define IRQ_ENABLE SOFTIRQ_ENABLE
-#define IRQ_ENTER SOFTIRQ_ENTER
-#define IRQ_EXIT SOFTIRQ_EXIT
Index: linux-2.6.24-rc6/lib/locking-selftest-spin-hardirq.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-spin-hardirq.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "locking-selftest-spin.h"
-#include "locking-selftest-hardirq.h"
Index: linux-2.6.24-rc6/lib/locking-selftest-spin-softirq.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-spin-softirq.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "locking-selftest-spin.h"
-#include "locking-selftest-softirq.h"
Index: linux-2.6.24-rc6/lib/locking-selftest-spin.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-spin.h
+++ /dev/null
@@ -1,11 +0,0 @@
-#undef LOCK
-#define LOCK L
-
-#undef UNLOCK
-#define UNLOCK U
-
-#undef RLOCK
-#undef WLOCK
-
-#undef INIT
-#define INIT SI
Index: linux-2.6.24-rc6/lib/locking-selftest-wlock-hardirq.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-wlock-hardirq.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "locking-selftest-wlock.h"
-#include "locking-selftest-hardirq.h"
Index: linux-2.6.24-rc6/lib/locking-selftest-wlock-softirq.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-wlock-softirq.h
+++ /dev/null
@@ -1,2 +0,0 @@
-#include "locking-selftest-wlock.h"
-#include "locking-selftest-softirq.h"
Index: linux-2.6.24-rc6/lib/locking-selftest-wlock.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-wlock.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#undef LOCK
-#define LOCK WL
-
-#undef UNLOCK
-#define UNLOCK WU
-
-#undef RLOCK
-#define RLOCK RL
-
-#undef WLOCK
-#define WLOCK WL
-
-#undef INIT
-#define INIT RWI
Index: linux-2.6.24-rc6/lib/locking-selftest-wsem.h
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest-wsem.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#undef LOCK
-#define LOCK WSL
-
-#undef UNLOCK
-#define UNLOCK WSU
-
-#undef RLOCK
-#define RLOCK RSL
-
-#undef WLOCK
-#define WLOCK WSL
-
-#undef INIT
-#define INIT RWSI
Index: linux-2.6.24-rc6/lib/locking-selftest.c
===================================================================
--- linux-2.6.24-rc6.orig/lib/locking-selftest.c
+++ /dev/null
@@ -1,1218 +0,0 @@
-/*
- * lib/locking-selftest.c
- *
- * Testsuite for various locking APIs: spinlocks, rwlocks,
- * mutexes and rw-semaphores.
- *
- * It is checking both false positives and false negatives.
- *
- * Started by Ingo Molnar:
- *
- * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@...hat.com>
- */
-#include <linux/rwsem.h>
-#include <linux/mutex.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/lockdep.h>
-#include <linux/spinlock.h>
-#include <linux/kallsyms.h>
-#include <linux/interrupt.h>
-#include <linux/debug_locks.h>
-#include <linux/irqflags.h>
-
-/*
- * Change this to 1 if you want to see the failure printouts:
- */
-static unsigned int debug_locks_verbose;
-
-static int __init setup_debug_locks_verbose(char *str)
-{
- get_option(&str, &debug_locks_verbose);
-
- return 1;
-}
-
-__setup("debug_locks_verbose=", setup_debug_locks_verbose);
-
-#define FAILURE 0
-#define SUCCESS 1
-
-#define LOCKTYPE_SPIN 0x1
-#define LOCKTYPE_RWLOCK 0x2
-#define LOCKTYPE_MUTEX 0x4
-#define LOCKTYPE_RWSEM 0x8
-
-/*
- * Normal standalone locks, for the circular and irq-context
- * dependency tests:
- */
-static DEFINE_SPINLOCK(lock_A);
-static DEFINE_SPINLOCK(lock_B);
-static DEFINE_SPINLOCK(lock_C);
-static DEFINE_SPINLOCK(lock_D);
-
-static DEFINE_RWLOCK(rwlock_A);
-static DEFINE_RWLOCK(rwlock_B);
-static DEFINE_RWLOCK(rwlock_C);
-static DEFINE_RWLOCK(rwlock_D);
-
-static DEFINE_MUTEX(mutex_A);
-static DEFINE_MUTEX(mutex_B);
-static DEFINE_MUTEX(mutex_C);
-static DEFINE_MUTEX(mutex_D);
-
-static DECLARE_RWSEM(rwsem_A);
-static DECLARE_RWSEM(rwsem_B);
-static DECLARE_RWSEM(rwsem_C);
-static DECLARE_RWSEM(rwsem_D);
-
-/*
- * Locks that we initialize dynamically as well so that
- * e.g. X1 and X2 becomes two instances of the same class,
- * but X* and Y* are different classes. We do this so that
- * we do not trigger a real lockup:
- */
-static DEFINE_SPINLOCK(lock_X1);
-static DEFINE_SPINLOCK(lock_X2);
-static DEFINE_SPINLOCK(lock_Y1);
-static DEFINE_SPINLOCK(lock_Y2);
-static DEFINE_SPINLOCK(lock_Z1);
-static DEFINE_SPINLOCK(lock_Z2);
-
-static DEFINE_RWLOCK(rwlock_X1);
-static DEFINE_RWLOCK(rwlock_X2);
-static DEFINE_RWLOCK(rwlock_Y1);
-static DEFINE_RWLOCK(rwlock_Y2);
-static DEFINE_RWLOCK(rwlock_Z1);
-static DEFINE_RWLOCK(rwlock_Z2);
-
-static DEFINE_MUTEX(mutex_X1);
-static DEFINE_MUTEX(mutex_X2);
-static DEFINE_MUTEX(mutex_Y1);
-static DEFINE_MUTEX(mutex_Y2);
-static DEFINE_MUTEX(mutex_Z1);
-static DEFINE_MUTEX(mutex_Z2);
-
-static DECLARE_RWSEM(rwsem_X1);
-static DECLARE_RWSEM(rwsem_X2);
-static DECLARE_RWSEM(rwsem_Y1);
-static DECLARE_RWSEM(rwsem_Y2);
-static DECLARE_RWSEM(rwsem_Z1);
-static DECLARE_RWSEM(rwsem_Z2);
-
-/*
- * non-inlined runtime initializers, to let separate locks share
- * the same lock-class:
- */
-#define INIT_CLASS_FUNC(class) \
-static noinline void \
-init_class_##class(spinlock_t *lock, rwlock_t *rwlock, struct mutex *mutex, \
- struct rw_semaphore *rwsem) \
-{ \
- spin_lock_init(lock); \
- rwlock_init(rwlock); \
- mutex_init(mutex); \
- init_rwsem(rwsem); \
-}
-
-INIT_CLASS_FUNC(X)
-INIT_CLASS_FUNC(Y)
-INIT_CLASS_FUNC(Z)
-
-static void init_shared_classes(void)
-{
- init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1);
- init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2);
-
- init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1);
- init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2);
-
- init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1);
- init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2);
-}
-
-/*
- * For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests.
- * The following functions use a lock from a simulated hardirq/softirq
- * context, causing the locks to be marked as hardirq-safe/softirq-safe:
- */
-
-#define HARDIRQ_DISABLE local_irq_disable
-#define HARDIRQ_ENABLE local_irq_enable
-
-#define HARDIRQ_ENTER() \
- local_irq_disable(); \
- irq_enter(); \
- WARN_ON(!in_irq());
-
-#define HARDIRQ_EXIT() \
- __irq_exit(); \
- local_irq_enable();
-
-#define SOFTIRQ_DISABLE local_bh_disable
-#define SOFTIRQ_ENABLE local_bh_enable
-
-#define SOFTIRQ_ENTER() \
- local_bh_disable(); \
- local_irq_disable(); \
- trace_softirq_enter(); \
- WARN_ON(!in_softirq());
-
-#define SOFTIRQ_EXIT() \
- trace_softirq_exit(); \
- local_irq_enable(); \
- local_bh_enable();
-
-/*
- * Shortcuts for lock/unlock API variants, to keep
- * the testcases compact:
- */
-#define L(x) spin_lock(&lock_##x)
-#define U(x) spin_unlock(&lock_##x)
-#define LU(x) L(x); U(x)
-#define SI(x) spin_lock_init(&lock_##x)
-
-#define WL(x) write_lock(&rwlock_##x)
-#define WU(x) write_unlock(&rwlock_##x)
-#define WLU(x) WL(x); WU(x)
-
-#define RL(x) read_lock(&rwlock_##x)
-#define RU(x) read_unlock(&rwlock_##x)
-#define RLU(x) RL(x); RU(x)
-#define RWI(x) rwlock_init(&rwlock_##x)
-
-#define ML(x) mutex_lock(&mutex_##x)
-#define MU(x) mutex_unlock(&mutex_##x)
-#define MI(x) mutex_init(&mutex_##x)
-
-#define WSL(x) down_write(&rwsem_##x)
-#define WSU(x) up_write(&rwsem_##x)
-
-#define RSL(x) down_read(&rwsem_##x)
-#define RSU(x) up_read(&rwsem_##x)
-#define RWSI(x) init_rwsem(&rwsem_##x)
-
-#define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x)
-
-/*
- * Generate different permutations of the same testcase, using
- * the same basic lock-dependency/state events:
- */
-
-#define GENERATE_TESTCASE(name) \
- \
-static void name(void) { E(); }
-
-#define GENERATE_PERMUTATIONS_2_EVENTS(name) \
- \
-static void name##_12(void) { E1(); E2(); } \
-static void name##_21(void) { E2(); E1(); }
-
-#define GENERATE_PERMUTATIONS_3_EVENTS(name) \
- \
-static void name##_123(void) { E1(); E2(); E3(); } \
-static void name##_132(void) { E1(); E3(); E2(); } \
-static void name##_213(void) { E2(); E1(); E3(); } \
-static void name##_231(void) { E2(); E3(); E1(); } \
-static void name##_312(void) { E3(); E1(); E2(); } \
-static void name##_321(void) { E3(); E2(); E1(); }
-
-/*
- * AA deadlock:
- */
-
-#define E() \
- \
- LOCK(X1); \
- LOCK(X2); /* this one should fail */
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(AA_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(AA_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(AA_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(AA_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(AA_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(AA_rsem)
-
-#undef E
-
-/*
- * Special-case for read-locking, they are
- * allowed to recurse on the same lock class:
- */
-static void rlock_AA1(void)
-{
- RL(X1);
- RL(X1); // this one should NOT fail
-}
-
-static void rlock_AA1B(void)
-{
- RL(X1);
- RL(X2); // this one should NOT fail
-}
-
-static void rsem_AA1(void)
-{
- RSL(X1);
- RSL(X1); // this one should fail
-}
-
-static void rsem_AA1B(void)
-{
- RSL(X1);
- RSL(X2); // this one should fail
-}
-/*
- * The mixing of read and write locks is not allowed:
- */
-static void rlock_AA2(void)
-{
- RL(X1);
- WL(X2); // this one should fail
-}
-
-static void rsem_AA2(void)
-{
- RSL(X1);
- WSL(X2); // this one should fail
-}
-
-static void rlock_AA3(void)
-{
- WL(X1);
- RL(X2); // this one should fail
-}
-
-static void rsem_AA3(void)
-{
- WSL(X1);
- RSL(X2); // this one should fail
-}
-
-/*
- * ABBA deadlock:
- */
-
-#define E() \
- \
- LOCK_UNLOCK_2(A, B); \
- LOCK_UNLOCK_2(B, A); /* fail */
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(ABBA_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(ABBA_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(ABBA_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(ABBA_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(ABBA_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(ABBA_rsem)
-
-#undef E
-
-/*
- * AB BC CA deadlock:
- */
-
-#define E() \
- \
- LOCK_UNLOCK_2(A, B); \
- LOCK_UNLOCK_2(B, C); \
- LOCK_UNLOCK_2(C, A); /* fail */
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(ABBCCA_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(ABBCCA_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(ABBCCA_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(ABBCCA_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(ABBCCA_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(ABBCCA_rsem)
-
-#undef E
-
-/*
- * AB CA BC deadlock:
- */
-
-#define E() \
- \
- LOCK_UNLOCK_2(A, B); \
- LOCK_UNLOCK_2(C, A); \
- LOCK_UNLOCK_2(B, C); /* fail */
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(ABCABC_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(ABCABC_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(ABCABC_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(ABCABC_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(ABCABC_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(ABCABC_rsem)
-
-#undef E
-
-/*
- * AB BC CD DA deadlock:
- */
-
-#define E() \
- \
- LOCK_UNLOCK_2(A, B); \
- LOCK_UNLOCK_2(B, C); \
- LOCK_UNLOCK_2(C, D); \
- LOCK_UNLOCK_2(D, A); /* fail */
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(ABBCCDDA_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(ABBCCDDA_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(ABBCCDDA_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(ABBCCDDA_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(ABBCCDDA_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(ABBCCDDA_rsem)
-
-#undef E
-
-/*
- * AB CD BD DA deadlock:
- */
-#define E() \
- \
- LOCK_UNLOCK_2(A, B); \
- LOCK_UNLOCK_2(C, D); \
- LOCK_UNLOCK_2(B, D); \
- LOCK_UNLOCK_2(D, A); /* fail */
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(ABCDBDDA_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(ABCDBDDA_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(ABCDBDDA_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(ABCDBDDA_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(ABCDBDDA_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(ABCDBDDA_rsem)
-
-#undef E
-
-/*
- * AB CD BC DA deadlock:
- */
-#define E() \
- \
- LOCK_UNLOCK_2(A, B); \
- LOCK_UNLOCK_2(C, D); \
- LOCK_UNLOCK_2(B, C); \
- LOCK_UNLOCK_2(D, A); /* fail */
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(ABCDBCDA_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(ABCDBCDA_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(ABCDBCDA_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(ABCDBCDA_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(ABCDBCDA_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(ABCDBCDA_rsem)
-
-#undef E
-
-/*
- * Double unlock:
- */
-#define E() \
- \
- LOCK(A); \
- UNLOCK(A); \
- UNLOCK(A); /* fail */
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(double_unlock_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(double_unlock_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(double_unlock_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(double_unlock_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(double_unlock_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(double_unlock_rsem)
-
-#undef E
-
-/*
- * Bad unlock ordering:
- */
-#define E() \
- \
- LOCK(A); \
- LOCK(B); \
- UNLOCK(A); /* fail */ \
- UNLOCK(B);
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(bad_unlock_order_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(bad_unlock_order_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(bad_unlock_order_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(bad_unlock_order_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(bad_unlock_order_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(bad_unlock_order_rsem)
-
-#undef E
-
-/*
- * initializing a held lock:
- */
-#define E() \
- \
- LOCK(A); \
- INIT(A); /* fail */
-
-/*
- * 6 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_TESTCASE(init_held_spin)
-#include "locking-selftest-wlock.h"
-GENERATE_TESTCASE(init_held_wlock)
-#include "locking-selftest-rlock.h"
-GENERATE_TESTCASE(init_held_rlock)
-#include "locking-selftest-mutex.h"
-GENERATE_TESTCASE(init_held_mutex)
-#include "locking-selftest-wsem.h"
-GENERATE_TESTCASE(init_held_wsem)
-#include "locking-selftest-rsem.h"
-GENERATE_TESTCASE(init_held_rsem)
-
-#undef E
-
-/*
- * locking an irq-safe lock with irqs enabled:
- */
-#define E1() \
- \
- IRQ_ENTER(); \
- LOCK(A); \
- UNLOCK(A); \
- IRQ_EXIT();
-
-#define E2() \
- \
- LOCK(A); \
- UNLOCK(A);
-
-/*
- * Generate 24 testcases:
- */
-#include "locking-selftest-spin-hardirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin)
-
-#include "locking-selftest-rlock-hardirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock)
-
-#include "locking-selftest-wlock-hardirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock)
-
-#include "locking-selftest-spin-softirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin)
-
-#include "locking-selftest-rlock-softirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock)
-
-#include "locking-selftest-wlock-softirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock)
-
-#undef E1
-#undef E2
-
-/*
- * Enabling hardirqs with a softirq-safe lock held:
- */
-#define E1() \
- \
- SOFTIRQ_ENTER(); \
- LOCK(A); \
- UNLOCK(A); \
- SOFTIRQ_EXIT();
-
-#define E2() \
- \
- HARDIRQ_DISABLE(); \
- LOCK(A); \
- HARDIRQ_ENABLE(); \
- UNLOCK(A);
-
-/*
- * Generate 12 testcases:
- */
-#include "locking-selftest-spin.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin)
-
-#include "locking-selftest-wlock.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock)
-
-#include "locking-selftest-rlock.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock)
-
-#undef E1
-#undef E2
-
-/*
- * Enabling irqs with an irq-safe lock held:
- */
-#define E1() \
- \
- IRQ_ENTER(); \
- LOCK(A); \
- UNLOCK(A); \
- IRQ_EXIT();
-
-#define E2() \
- \
- IRQ_DISABLE(); \
- LOCK(A); \
- IRQ_ENABLE(); \
- UNLOCK(A);
-
-/*
- * Generate 24 testcases:
- */
-#include "locking-selftest-spin-hardirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin)
-
-#include "locking-selftest-rlock-hardirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock)
-
-#include "locking-selftest-wlock-hardirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock)
-
-#include "locking-selftest-spin-softirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin)
-
-#include "locking-selftest-rlock-softirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock)
-
-#include "locking-selftest-wlock-softirq.h"
-GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock)
-
-#undef E1
-#undef E2
-
-/*
- * Acquiring a irq-unsafe lock while holding an irq-safe-lock:
- */
-#define E1() \
- \
- LOCK(A); \
- LOCK(B); \
- UNLOCK(B); \
- UNLOCK(A); \
-
-#define E2() \
- \
- LOCK(B); \
- UNLOCK(B);
-
-#define E3() \
- \
- IRQ_ENTER(); \
- LOCK(A); \
- UNLOCK(A); \
- IRQ_EXIT();
-
-/*
- * Generate 36 testcases:
- */
-#include "locking-selftest-spin-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin)
-
-#include "locking-selftest-rlock-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock)
-
-#include "locking-selftest-wlock-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock)
-
-#include "locking-selftest-spin-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin)
-
-#include "locking-selftest-rlock-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock)
-
-#include "locking-selftest-wlock-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock)
-
-#undef E1
-#undef E2
-#undef E3
-
-/*
- * If a lock turns into softirq-safe, but earlier it took
- * a softirq-unsafe lock:
- */
-
-#define E1() \
- IRQ_DISABLE(); \
- LOCK(A); \
- LOCK(B); \
- UNLOCK(B); \
- UNLOCK(A); \
- IRQ_ENABLE();
-
-#define E2() \
- LOCK(B); \
- UNLOCK(B);
-
-#define E3() \
- IRQ_ENTER(); \
- LOCK(A); \
- UNLOCK(A); \
- IRQ_EXIT();
-
-/*
- * Generate 36 testcases:
- */
-#include "locking-selftest-spin-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin)
-
-#include "locking-selftest-rlock-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock)
-
-#include "locking-selftest-wlock-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock)
-
-#include "locking-selftest-spin-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin)
-
-#include "locking-selftest-rlock-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock)
-
-#include "locking-selftest-wlock-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock)
-
-#undef E1
-#undef E2
-#undef E3
-
-/*
- * read-lock / write-lock irq inversion.
- *
- * Deadlock scenario:
- *
- * CPU#1 is at #1, i.e. it has write-locked A, but has not
- * taken B yet.
- *
- * CPU#2 is at #2, i.e. it has locked B.
- *
- * Hardirq hits CPU#2 at point #2 and is trying to read-lock A.
- *
- * The deadlock occurs because CPU#1 will spin on B, and CPU#2
- * will spin on A.
- */
-
-#define E1() \
- \
- IRQ_DISABLE(); \
- WL(A); \
- LOCK(B); \
- UNLOCK(B); \
- WU(A); \
- IRQ_ENABLE();
-
-#define E2() \
- \
- LOCK(B); \
- UNLOCK(B);
-
-#define E3() \
- \
- IRQ_ENTER(); \
- RL(A); \
- RU(A); \
- IRQ_EXIT();
-
-/*
- * Generate 36 testcases:
- */
-#include "locking-selftest-spin-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin)
-
-#include "locking-selftest-rlock-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock)
-
-#include "locking-selftest-wlock-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock)
-
-#include "locking-selftest-spin-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin)
-
-#include "locking-selftest-rlock-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock)
-
-#include "locking-selftest-wlock-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock)
-
-#undef E1
-#undef E2
-#undef E3
-
-/*
- * read-lock / write-lock recursion that is actually safe.
- */
-
-#define E1() \
- \
- IRQ_DISABLE(); \
- WL(A); \
- WU(A); \
- IRQ_ENABLE();
-
-#define E2() \
- \
- RL(A); \
- RU(A); \
-
-#define E3() \
- \
- IRQ_ENTER(); \
- RL(A); \
- L(B); \
- U(B); \
- RU(A); \
- IRQ_EXIT();
-
-/*
- * Generate 12 testcases:
- */
-#include "locking-selftest-hardirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard)
-
-#include "locking-selftest-softirq.h"
-GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
-
-#undef E1
-#undef E2
-#undef E3
-
-/*
- * read-lock / write-lock recursion that is unsafe.
- */
-
-#define E1() \
- \
- IRQ_DISABLE(); \
- L(B); \
- WL(A); \
- WU(A); \
- U(B); \
- IRQ_ENABLE();
-
-#define E2() \
- \
- RL(A); \
- RU(A); \
-
-#define E3() \
- \
- IRQ_ENTER(); \
- L(B); \
- U(B); \
- IRQ_EXIT();
-
-/*
- * Generate 12 testcases:
- */
-#include "locking-selftest-hardirq.h"
-// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard)
-
-#include "locking-selftest-softirq.h"
-// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft)
-
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map)
-# 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)
-#else
-# define I_SPINLOCK(x)
-# define I_RWLOCK(x)
-# define I_MUTEX(x)
-# define I_RWSEM(x)
-#endif
-
-#define I1(x) \
- do { \
- I_SPINLOCK(x); \
- I_RWLOCK(x); \
- I_MUTEX(x); \
- I_RWSEM(x); \
- } while (0)
-
-#define I2(x) \
- do { \
- spin_lock_init(&lock_##x); \
- rwlock_init(&rwlock_##x); \
- mutex_init(&mutex_##x); \
- init_rwsem(&rwsem_##x); \
- } while (0)
-
-static void reset_locks(void)
-{
- local_irq_disable();
- I1(A); I1(B); I1(C); I1(D);
- I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2);
- lockdep_reset();
- I2(A); I2(B); I2(C); I2(D);
- init_shared_classes();
- local_irq_enable();
-}
-
-#undef I
-
-static int testcase_total;
-static int testcase_successes;
-static int expected_testcase_failures;
-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());
-
- testcase_fn();
- /*
- * 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;
-#endif
- if (debug_locks != expected) {
- if (expected_failure) {
- expected_testcase_failures++;
- printk("failed|");
- } else {
- unexpected_testcase_failures++;
-
- printk("FAILED|");
- dump_stack();
- }
- } else {
- testcase_successes++;
- printk(" ok |");
- }
- testcase_total++;
-
- if (debug_locks_verbose)
- printk(" lockclass mask: %x, debug_locks: %d, expected: %d\n",
- lockclass_mask, debug_locks, expected);
- /*
- * Some tests (e.g. double-unlock) might corrupt the preemption
- * count, so restore it:
- */
- preempt_count() = saved_preempt_count;
-#ifdef CONFIG_TRACE_IRQFLAGS
- if (softirq_count())
- current->softirqs_enabled = 0;
- else
- current->softirqs_enabled = 1;
-#endif
-
- reset_locks();
-}
-
-static inline void print_testname(const char *testname)
-{
- printk("%33s:", testname);
-}
-
-#define DO_TESTCASE_1(desc, name, nr) \
- print_testname(desc"/"#nr); \
- dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
- printk("\n");
-
-#define DO_TESTCASE_1B(desc, name, nr) \
- print_testname(desc"/"#nr); \
- dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \
- printk("\n");
-
-#define DO_TESTCASE_3(desc, name, nr) \
- print_testname(desc"/"#nr); \
- dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \
- dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
- dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
- printk("\n");
-
-#define DO_TESTCASE_3RW(desc, name, nr) \
- print_testname(desc"/"#nr); \
- dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\
- dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
- dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
- printk("\n");
-
-#define DO_TESTCASE_6(desc, name) \
- print_testname(desc); \
- dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
- dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
- dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \
- dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
- dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
- dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
- printk("\n");
-
-#define DO_TESTCASE_6_SUCCESS(desc, name) \
- print_testname(desc); \
- dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \
- dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \
- dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
- dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \
- dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \
- dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \
- printk("\n");
-
-/*
- * 'read' variant: rlocks must not trigger.
- */
-#define DO_TESTCASE_6R(desc, name) \
- print_testname(desc); \
- dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
- dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
- dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
- dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
- dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
- dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
- printk("\n");
-
-#define DO_TESTCASE_2I(desc, name, nr) \
- DO_TESTCASE_1("hard-"desc, name##_hard, nr); \
- DO_TESTCASE_1("soft-"desc, name##_soft, nr);
-
-#define DO_TESTCASE_2IB(desc, name, nr) \
- DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \
- DO_TESTCASE_1B("soft-"desc, name##_soft, nr);
-
-#define DO_TESTCASE_6I(desc, name, nr) \
- DO_TESTCASE_3("hard-"desc, name##_hard, nr); \
- DO_TESTCASE_3("soft-"desc, name##_soft, nr);
-
-#define DO_TESTCASE_6IRW(desc, name, nr) \
- DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \
- DO_TESTCASE_3RW("soft-"desc, name##_soft, nr);
-
-#define DO_TESTCASE_2x3(desc, name) \
- DO_TESTCASE_3(desc, name, 12); \
- DO_TESTCASE_3(desc, name, 21);
-
-#define DO_TESTCASE_2x6(desc, name) \
- DO_TESTCASE_6I(desc, name, 12); \
- DO_TESTCASE_6I(desc, name, 21);
-
-#define DO_TESTCASE_6x2(desc, name) \
- DO_TESTCASE_2I(desc, name, 123); \
- DO_TESTCASE_2I(desc, name, 132); \
- DO_TESTCASE_2I(desc, name, 213); \
- DO_TESTCASE_2I(desc, name, 231); \
- DO_TESTCASE_2I(desc, name, 312); \
- DO_TESTCASE_2I(desc, name, 321);
-
-#define DO_TESTCASE_6x2B(desc, name) \
- DO_TESTCASE_2IB(desc, name, 123); \
- DO_TESTCASE_2IB(desc, name, 132); \
- DO_TESTCASE_2IB(desc, name, 213); \
- DO_TESTCASE_2IB(desc, name, 231); \
- DO_TESTCASE_2IB(desc, name, 312); \
- DO_TESTCASE_2IB(desc, name, 321);
-
-#define DO_TESTCASE_6x6(desc, name) \
- DO_TESTCASE_6I(desc, name, 123); \
- DO_TESTCASE_6I(desc, name, 132); \
- DO_TESTCASE_6I(desc, name, 213); \
- DO_TESTCASE_6I(desc, name, 231); \
- DO_TESTCASE_6I(desc, name, 312); \
- DO_TESTCASE_6I(desc, name, 321);
-
-#define DO_TESTCASE_6x6RW(desc, name) \
- DO_TESTCASE_6IRW(desc, name, 123); \
- DO_TESTCASE_6IRW(desc, name, 132); \
- DO_TESTCASE_6IRW(desc, name, 213); \
- DO_TESTCASE_6IRW(desc, name, 231); \
- DO_TESTCASE_6IRW(desc, name, 312); \
- DO_TESTCASE_6IRW(desc, name, 321);
-
-
-void locking_selftest(void)
-{
- /*
- * Got a locking failure before the selftest ran?
- */
- if (!debug_locks) {
- printk("----------------------------------\n");
- printk("| Locking API testsuite disabled |\n");
- printk("----------------------------------\n");
- return;
- }
-
- /*
- * Run the testsuite:
- */
- printk("------------------------\n");
- printk("| Locking API testsuite:\n");
- printk("----------------------------------------------------------------------------\n");
- printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n");
- printk(" --------------------------------------------------------------------------\n");
-
- init_shared_classes();
- debug_locks_silent = !debug_locks_verbose;
-
- DO_TESTCASE_6R("A-A deadlock", AA);
- DO_TESTCASE_6R("A-B-B-A deadlock", ABBA);
- DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA);
- DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC);
- DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA);
- DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA);
- DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA);
- DO_TESTCASE_6("double unlock", double_unlock);
- DO_TESTCASE_6("initialize held", init_held);
- DO_TESTCASE_6_SUCCESS("bad unlock order", bad_unlock_order);
-
- printk(" --------------------------------------------------------------------------\n");
- print_testname("recursive read-lock");
- printk(" |");
- dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK);
- printk(" |");
- dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM);
- printk("\n");
-
- print_testname("recursive read-lock #2");
- printk(" |");
- dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK);
- printk(" |");
- dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM);
- printk("\n");
-
- print_testname("mixed read-write-lock");
- printk(" |");
- dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK);
- printk(" |");
- dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM);
- printk("\n");
-
- print_testname("mixed write-read-lock");
- printk(" |");
- dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK);
- printk(" |");
- dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM);
- printk("\n");
-
- printk(" --------------------------------------------------------------------------\n");
-
- /*
- * irq-context testcases:
- */
- DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1);
- DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A);
- DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B);
- DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3);
- DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4);
- DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion);
-
- DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion);
-// DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2);
-
- if (unexpected_testcase_failures) {
- printk("-----------------------------------------------------------------\n");
- debug_locks = 0;
- printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n",
- unexpected_testcase_failures, testcase_total);
- printk("-----------------------------------------------------------------\n");
- } else if (expected_testcase_failures && testcase_successes) {
- printk("--------------------------------------------------------\n");
- printk("%3d out of %3d testcases failed, as expected. |\n",
- expected_testcase_failures, testcase_total);
- printk("----------------------------------------------------\n");
- debug_locks = 1;
- } else if (expected_testcase_failures && !testcase_successes) {
- printk("--------------------------------------------------------\n");
- printk("All %3d testcases failed, as expected. |\n",
- expected_testcase_failures);
- printk("----------------------------------------\n");
- debug_locks = 1;
- } else {
- printk("-------------------------------------------------------\n");
- printk("Good, all %3d testcases passed! |\n",
- testcase_successes);
- printk("---------------------------------\n");
- debug_locks = 1;
- }
- debug_locks_silent = 0;
-}
Index: linux-2.6.24-rc6/tests/Kconfig
===================================================================
--- linux-2.6.24-rc6.orig/tests/Kconfig
+++ linux-2.6.24-rc6/tests/Kconfig
@@ -7,5 +7,16 @@ menuconfig KERNEL_TESTS
if KERNEL_TESTS
+config DEBUG_LOCKING_API_SELFTESTS
+ bool "Locking API boot-time self-tests"
+ depends on DEBUG_KERNEL
+ help
+ Say Y here if you want the kernel to run a short self-test during
+ bootup. The self-test checks whether common types of locking bugs
+ are detected by debugging mechanisms or not. (if you disable
+ lock debugging then those bugs wont be detected of course.)
+ The following locking APIs are covered: spinlocks, rwlocks,
+ mutexes and rwsems.
+
endif # KERNEL_TESTS
Index: linux-2.6.24-rc6/tests/Makefile
===================================================================
--- linux-2.6.24-rc6.orig/tests/Makefile
+++ linux-2.6.24-rc6/tests/Makefile
@@ -1,3 +1,5 @@
#
# Makefile for kernel subsystem specific tests
#
+
+obj-$(CONFIG_DEBUG_LOCKING_API_SELFTESTS) += locking-selftest.o
Index: linux-2.6.24-rc6/tests/locking-selftest-hardirq.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-hardirq.h
@@ -0,0 +1,9 @@
+#undef IRQ_DISABLE
+#undef IRQ_ENABLE
+#undef IRQ_ENTER
+#undef IRQ_EXIT
+
+#define IRQ_ENABLE HARDIRQ_ENABLE
+#define IRQ_DISABLE HARDIRQ_DISABLE
+#define IRQ_ENTER HARDIRQ_ENTER
+#define IRQ_EXIT HARDIRQ_EXIT
Index: linux-2.6.24-rc6/tests/locking-selftest-mutex.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-mutex.h
@@ -0,0 +1,11 @@
+#undef LOCK
+#define LOCK ML
+
+#undef UNLOCK
+#define UNLOCK MU
+
+#undef RLOCK
+#undef WLOCK
+
+#undef INIT
+#define INIT MI
Index: linux-2.6.24-rc6/tests/locking-selftest-rlock-hardirq.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-rlock-hardirq.h
@@ -0,0 +1,2 @@
+#include "locking-selftest-rlock.h"
+#include "locking-selftest-hardirq.h"
Index: linux-2.6.24-rc6/tests/locking-selftest-rlock-softirq.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-rlock-softirq.h
@@ -0,0 +1,2 @@
+#include "locking-selftest-rlock.h"
+#include "locking-selftest-softirq.h"
Index: linux-2.6.24-rc6/tests/locking-selftest-rlock.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-rlock.h
@@ -0,0 +1,14 @@
+#undef LOCK
+#define LOCK RL
+
+#undef UNLOCK
+#define UNLOCK RU
+
+#undef RLOCK
+#define RLOCK RL
+
+#undef WLOCK
+#define WLOCK WL
+
+#undef INIT
+#define INIT RWI
Index: linux-2.6.24-rc6/tests/locking-selftest-rsem.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-rsem.h
@@ -0,0 +1,14 @@
+#undef LOCK
+#define LOCK RSL
+
+#undef UNLOCK
+#define UNLOCK RSU
+
+#undef RLOCK
+#define RLOCK RSL
+
+#undef WLOCK
+#define WLOCK WSL
+
+#undef INIT
+#define INIT RWSI
Index: linux-2.6.24-rc6/tests/locking-selftest-softirq.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-softirq.h
@@ -0,0 +1,9 @@
+#undef IRQ_DISABLE
+#undef IRQ_ENABLE
+#undef IRQ_ENTER
+#undef IRQ_EXIT
+
+#define IRQ_DISABLE SOFTIRQ_DISABLE
+#define IRQ_ENABLE SOFTIRQ_ENABLE
+#define IRQ_ENTER SOFTIRQ_ENTER
+#define IRQ_EXIT SOFTIRQ_EXIT
Index: linux-2.6.24-rc6/tests/locking-selftest-spin-hardirq.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-spin-hardirq.h
@@ -0,0 +1,2 @@
+#include "locking-selftest-spin.h"
+#include "locking-selftest-hardirq.h"
Index: linux-2.6.24-rc6/tests/locking-selftest-spin-softirq.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-spin-softirq.h
@@ -0,0 +1,2 @@
+#include "locking-selftest-spin.h"
+#include "locking-selftest-softirq.h"
Index: linux-2.6.24-rc6/tests/locking-selftest-spin.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-spin.h
@@ -0,0 +1,11 @@
+#undef LOCK
+#define LOCK L
+
+#undef UNLOCK
+#define UNLOCK U
+
+#undef RLOCK
+#undef WLOCK
+
+#undef INIT
+#define INIT SI
Index: linux-2.6.24-rc6/tests/locking-selftest-wlock-hardirq.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-wlock-hardirq.h
@@ -0,0 +1,2 @@
+#include "locking-selftest-wlock.h"
+#include "locking-selftest-hardirq.h"
Index: linux-2.6.24-rc6/tests/locking-selftest-wlock-softirq.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-wlock-softirq.h
@@ -0,0 +1,2 @@
+#include "locking-selftest-wlock.h"
+#include "locking-selftest-softirq.h"
Index: linux-2.6.24-rc6/tests/locking-selftest-wlock.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-wlock.h
@@ -0,0 +1,14 @@
+#undef LOCK
+#define LOCK WL
+
+#undef UNLOCK
+#define UNLOCK WU
+
+#undef RLOCK
+#define RLOCK RL
+
+#undef WLOCK
+#define WLOCK WL
+
+#undef INIT
+#define INIT RWI
Index: linux-2.6.24-rc6/tests/locking-selftest-wsem.h
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest-wsem.h
@@ -0,0 +1,14 @@
+#undef LOCK
+#define LOCK WSL
+
+#undef UNLOCK
+#define UNLOCK WSU
+
+#undef RLOCK
+#define RLOCK RSL
+
+#undef WLOCK
+#define WLOCK WSL
+
+#undef INIT
+#define INIT RWSI
Index: linux-2.6.24-rc6/tests/locking-selftest.c
===================================================================
--- /dev/null
+++ linux-2.6.24-rc6/tests/locking-selftest.c
@@ -0,0 +1,1218 @@
+/*
+ * lib/locking-selftest.c
+ *
+ * Testsuite for various locking APIs: spinlocks, rwlocks,
+ * mutexes and rw-semaphores.
+ *
+ * It is checking both false positives and false negatives.
+ *
+ * Started by Ingo Molnar:
+ *
+ * Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@...hat.com>
+ */
+#include <linux/rwsem.h>
+#include <linux/mutex.h>
+#include <linux/sched.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/lockdep.h>
+#include <linux/spinlock.h>
+#include <linux/kallsyms.h>
+#include <linux/interrupt.h>
+#include <linux/debug_locks.h>
+#include <linux/irqflags.h>
+
+/*
+ * Change this to 1 if you want to see the failure printouts:
+ */
+static unsigned int debug_locks_verbose;
+
+static int __init setup_debug_locks_verbose(char *str)
+{
+ get_option(&str, &debug_locks_verbose);
+
+ return 1;
+}
+
+__setup("debug_locks_verbose=", setup_debug_locks_verbose);
+
+#define FAILURE 0
+#define SUCCESS 1
+
+#define LOCKTYPE_SPIN 0x1
+#define LOCKTYPE_RWLOCK 0x2
+#define LOCKTYPE_MUTEX 0x4
+#define LOCKTYPE_RWSEM 0x8
+
+/*
+ * Normal standalone locks, for the circular and irq-context
+ * dependency tests:
+ */
+static DEFINE_SPINLOCK(lock_A);
+static DEFINE_SPINLOCK(lock_B);
+static DEFINE_SPINLOCK(lock_C);
+static DEFINE_SPINLOCK(lock_D);
+
+static DEFINE_RWLOCK(rwlock_A);
+static DEFINE_RWLOCK(rwlock_B);
+static DEFINE_RWLOCK(rwlock_C);
+static DEFINE_RWLOCK(rwlock_D);
+
+static DEFINE_MUTEX(mutex_A);
+static DEFINE_MUTEX(mutex_B);
+static DEFINE_MUTEX(mutex_C);
+static DEFINE_MUTEX(mutex_D);
+
+static DECLARE_RWSEM(rwsem_A);
+static DECLARE_RWSEM(rwsem_B);
+static DECLARE_RWSEM(rwsem_C);
+static DECLARE_RWSEM(rwsem_D);
+
+/*
+ * Locks that we initialize dynamically as well so that
+ * e.g. X1 and X2 becomes two instances of the same class,
+ * but X* and Y* are different classes. We do this so that
+ * we do not trigger a real lockup:
+ */
+static DEFINE_SPINLOCK(lock_X1);
+static DEFINE_SPINLOCK(lock_X2);
+static DEFINE_SPINLOCK(lock_Y1);
+static DEFINE_SPINLOCK(lock_Y2);
+static DEFINE_SPINLOCK(lock_Z1);
+static DEFINE_SPINLOCK(lock_Z2);
+
+static DEFINE_RWLOCK(rwlock_X1);
+static DEFINE_RWLOCK(rwlock_X2);
+static DEFINE_RWLOCK(rwlock_Y1);
+static DEFINE_RWLOCK(rwlock_Y2);
+static DEFINE_RWLOCK(rwlock_Z1);
+static DEFINE_RWLOCK(rwlock_Z2);
+
+static DEFINE_MUTEX(mutex_X1);
+static DEFINE_MUTEX(mutex_X2);
+static DEFINE_MUTEX(mutex_Y1);
+static DEFINE_MUTEX(mutex_Y2);
+static DEFINE_MUTEX(mutex_Z1);
+static DEFINE_MUTEX(mutex_Z2);
+
+static DECLARE_RWSEM(rwsem_X1);
+static DECLARE_RWSEM(rwsem_X2);
+static DECLARE_RWSEM(rwsem_Y1);
+static DECLARE_RWSEM(rwsem_Y2);
+static DECLARE_RWSEM(rwsem_Z1);
+static DECLARE_RWSEM(rwsem_Z2);
+
+/*
+ * non-inlined runtime initializers, to let separate locks share
+ * the same lock-class:
+ */
+#define INIT_CLASS_FUNC(class) \
+static noinline void \
+init_class_##class(spinlock_t *lock, rwlock_t *rwlock, struct mutex *mutex, \
+ struct rw_semaphore *rwsem) \
+{ \
+ spin_lock_init(lock); \
+ rwlock_init(rwlock); \
+ mutex_init(mutex); \
+ init_rwsem(rwsem); \
+}
+
+INIT_CLASS_FUNC(X)
+INIT_CLASS_FUNC(Y)
+INIT_CLASS_FUNC(Z)
+
+static void init_shared_classes(void)
+{
+ init_class_X(&lock_X1, &rwlock_X1, &mutex_X1, &rwsem_X1);
+ init_class_X(&lock_X2, &rwlock_X2, &mutex_X2, &rwsem_X2);
+
+ init_class_Y(&lock_Y1, &rwlock_Y1, &mutex_Y1, &rwsem_Y1);
+ init_class_Y(&lock_Y2, &rwlock_Y2, &mutex_Y2, &rwsem_Y2);
+
+ init_class_Z(&lock_Z1, &rwlock_Z1, &mutex_Z1, &rwsem_Z1);
+ init_class_Z(&lock_Z2, &rwlock_Z2, &mutex_Z2, &rwsem_Z2);
+}
+
+/*
+ * For spinlocks and rwlocks we also do hardirq-safe / softirq-safe tests.
+ * The following functions use a lock from a simulated hardirq/softirq
+ * context, causing the locks to be marked as hardirq-safe/softirq-safe:
+ */
+
+#define HARDIRQ_DISABLE local_irq_disable
+#define HARDIRQ_ENABLE local_irq_enable
+
+#define HARDIRQ_ENTER() \
+ local_irq_disable(); \
+ irq_enter(); \
+ WARN_ON(!in_irq());
+
+#define HARDIRQ_EXIT() \
+ __irq_exit(); \
+ local_irq_enable();
+
+#define SOFTIRQ_DISABLE local_bh_disable
+#define SOFTIRQ_ENABLE local_bh_enable
+
+#define SOFTIRQ_ENTER() \
+ local_bh_disable(); \
+ local_irq_disable(); \
+ trace_softirq_enter(); \
+ WARN_ON(!in_softirq());
+
+#define SOFTIRQ_EXIT() \
+ trace_softirq_exit(); \
+ local_irq_enable(); \
+ local_bh_enable();
+
+/*
+ * Shortcuts for lock/unlock API variants, to keep
+ * the testcases compact:
+ */
+#define L(x) spin_lock(&lock_##x)
+#define U(x) spin_unlock(&lock_##x)
+#define LU(x) L(x); U(x)
+#define SI(x) spin_lock_init(&lock_##x)
+
+#define WL(x) write_lock(&rwlock_##x)
+#define WU(x) write_unlock(&rwlock_##x)
+#define WLU(x) WL(x); WU(x)
+
+#define RL(x) read_lock(&rwlock_##x)
+#define RU(x) read_unlock(&rwlock_##x)
+#define RLU(x) RL(x); RU(x)
+#define RWI(x) rwlock_init(&rwlock_##x)
+
+#define ML(x) mutex_lock(&mutex_##x)
+#define MU(x) mutex_unlock(&mutex_##x)
+#define MI(x) mutex_init(&mutex_##x)
+
+#define WSL(x) down_write(&rwsem_##x)
+#define WSU(x) up_write(&rwsem_##x)
+
+#define RSL(x) down_read(&rwsem_##x)
+#define RSU(x) up_read(&rwsem_##x)
+#define RWSI(x) init_rwsem(&rwsem_##x)
+
+#define LOCK_UNLOCK_2(x,y) LOCK(x); LOCK(y); UNLOCK(y); UNLOCK(x)
+
+/*
+ * Generate different permutations of the same testcase, using
+ * the same basic lock-dependency/state events:
+ */
+
+#define GENERATE_TESTCASE(name) \
+ \
+static void name(void) { E(); }
+
+#define GENERATE_PERMUTATIONS_2_EVENTS(name) \
+ \
+static void name##_12(void) { E1(); E2(); } \
+static void name##_21(void) { E2(); E1(); }
+
+#define GENERATE_PERMUTATIONS_3_EVENTS(name) \
+ \
+static void name##_123(void) { E1(); E2(); E3(); } \
+static void name##_132(void) { E1(); E3(); E2(); } \
+static void name##_213(void) { E2(); E1(); E3(); } \
+static void name##_231(void) { E2(); E3(); E1(); } \
+static void name##_312(void) { E3(); E1(); E2(); } \
+static void name##_321(void) { E3(); E2(); E1(); }
+
+/*
+ * AA deadlock:
+ */
+
+#define E() \
+ \
+ LOCK(X1); \
+ LOCK(X2); /* this one should fail */
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(AA_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(AA_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(AA_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(AA_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(AA_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(AA_rsem)
+
+#undef E
+
+/*
+ * Special-case for read-locking, they are
+ * allowed to recurse on the same lock class:
+ */
+static void rlock_AA1(void)
+{
+ RL(X1);
+ RL(X1); // this one should NOT fail
+}
+
+static void rlock_AA1B(void)
+{
+ RL(X1);
+ RL(X2); // this one should NOT fail
+}
+
+static void rsem_AA1(void)
+{
+ RSL(X1);
+ RSL(X1); // this one should fail
+}
+
+static void rsem_AA1B(void)
+{
+ RSL(X1);
+ RSL(X2); // this one should fail
+}
+/*
+ * The mixing of read and write locks is not allowed:
+ */
+static void rlock_AA2(void)
+{
+ RL(X1);
+ WL(X2); // this one should fail
+}
+
+static void rsem_AA2(void)
+{
+ RSL(X1);
+ WSL(X2); // this one should fail
+}
+
+static void rlock_AA3(void)
+{
+ WL(X1);
+ RL(X2); // this one should fail
+}
+
+static void rsem_AA3(void)
+{
+ WSL(X1);
+ RSL(X2); // this one should fail
+}
+
+/*
+ * ABBA deadlock:
+ */
+
+#define E() \
+ \
+ LOCK_UNLOCK_2(A, B); \
+ LOCK_UNLOCK_2(B, A); /* fail */
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(ABBA_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(ABBA_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(ABBA_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(ABBA_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(ABBA_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(ABBA_rsem)
+
+#undef E
+
+/*
+ * AB BC CA deadlock:
+ */
+
+#define E() \
+ \
+ LOCK_UNLOCK_2(A, B); \
+ LOCK_UNLOCK_2(B, C); \
+ LOCK_UNLOCK_2(C, A); /* fail */
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(ABBCCA_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(ABBCCA_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(ABBCCA_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(ABBCCA_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(ABBCCA_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(ABBCCA_rsem)
+
+#undef E
+
+/*
+ * AB CA BC deadlock:
+ */
+
+#define E() \
+ \
+ LOCK_UNLOCK_2(A, B); \
+ LOCK_UNLOCK_2(C, A); \
+ LOCK_UNLOCK_2(B, C); /* fail */
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(ABCABC_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(ABCABC_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(ABCABC_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(ABCABC_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(ABCABC_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(ABCABC_rsem)
+
+#undef E
+
+/*
+ * AB BC CD DA deadlock:
+ */
+
+#define E() \
+ \
+ LOCK_UNLOCK_2(A, B); \
+ LOCK_UNLOCK_2(B, C); \
+ LOCK_UNLOCK_2(C, D); \
+ LOCK_UNLOCK_2(D, A); /* fail */
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(ABBCCDDA_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(ABBCCDDA_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(ABBCCDDA_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(ABBCCDDA_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(ABBCCDDA_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(ABBCCDDA_rsem)
+
+#undef E
+
+/*
+ * AB CD BD DA deadlock:
+ */
+#define E() \
+ \
+ LOCK_UNLOCK_2(A, B); \
+ LOCK_UNLOCK_2(C, D); \
+ LOCK_UNLOCK_2(B, D); \
+ LOCK_UNLOCK_2(D, A); /* fail */
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(ABCDBDDA_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(ABCDBDDA_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(ABCDBDDA_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(ABCDBDDA_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(ABCDBDDA_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(ABCDBDDA_rsem)
+
+#undef E
+
+/*
+ * AB CD BC DA deadlock:
+ */
+#define E() \
+ \
+ LOCK_UNLOCK_2(A, B); \
+ LOCK_UNLOCK_2(C, D); \
+ LOCK_UNLOCK_2(B, C); \
+ LOCK_UNLOCK_2(D, A); /* fail */
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(ABCDBCDA_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(ABCDBCDA_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(ABCDBCDA_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(ABCDBCDA_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(ABCDBCDA_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(ABCDBCDA_rsem)
+
+#undef E
+
+/*
+ * Double unlock:
+ */
+#define E() \
+ \
+ LOCK(A); \
+ UNLOCK(A); \
+ UNLOCK(A); /* fail */
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(double_unlock_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(double_unlock_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(double_unlock_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(double_unlock_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(double_unlock_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(double_unlock_rsem)
+
+#undef E
+
+/*
+ * Bad unlock ordering:
+ */
+#define E() \
+ \
+ LOCK(A); \
+ LOCK(B); \
+ UNLOCK(A); /* fail */ \
+ UNLOCK(B);
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(bad_unlock_order_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(bad_unlock_order_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(bad_unlock_order_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(bad_unlock_order_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(bad_unlock_order_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(bad_unlock_order_rsem)
+
+#undef E
+
+/*
+ * initializing a held lock:
+ */
+#define E() \
+ \
+ LOCK(A); \
+ INIT(A); /* fail */
+
+/*
+ * 6 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_TESTCASE(init_held_spin)
+#include "locking-selftest-wlock.h"
+GENERATE_TESTCASE(init_held_wlock)
+#include "locking-selftest-rlock.h"
+GENERATE_TESTCASE(init_held_rlock)
+#include "locking-selftest-mutex.h"
+GENERATE_TESTCASE(init_held_mutex)
+#include "locking-selftest-wsem.h"
+GENERATE_TESTCASE(init_held_wsem)
+#include "locking-selftest-rsem.h"
+GENERATE_TESTCASE(init_held_rsem)
+
+#undef E
+
+/*
+ * locking an irq-safe lock with irqs enabled:
+ */
+#define E1() \
+ \
+ IRQ_ENTER(); \
+ LOCK(A); \
+ UNLOCK(A); \
+ IRQ_EXIT();
+
+#define E2() \
+ \
+ LOCK(A); \
+ UNLOCK(A);
+
+/*
+ * Generate 24 testcases:
+ */
+#include "locking-selftest-spin-hardirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_spin)
+
+#include "locking-selftest-rlock-hardirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_rlock)
+
+#include "locking-selftest-wlock-hardirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_hard_wlock)
+
+#include "locking-selftest-spin-softirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_spin)
+
+#include "locking-selftest-rlock-softirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_rlock)
+
+#include "locking-selftest-wlock-softirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe1_soft_wlock)
+
+#undef E1
+#undef E2
+
+/*
+ * Enabling hardirqs with a softirq-safe lock held:
+ */
+#define E1() \
+ \
+ SOFTIRQ_ENTER(); \
+ LOCK(A); \
+ UNLOCK(A); \
+ SOFTIRQ_EXIT();
+
+#define E2() \
+ \
+ HARDIRQ_DISABLE(); \
+ LOCK(A); \
+ HARDIRQ_ENABLE(); \
+ UNLOCK(A);
+
+/*
+ * Generate 12 testcases:
+ */
+#include "locking-selftest-spin.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_spin)
+
+#include "locking-selftest-wlock.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_wlock)
+
+#include "locking-selftest-rlock.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2A_rlock)
+
+#undef E1
+#undef E2
+
+/*
+ * Enabling irqs with an irq-safe lock held:
+ */
+#define E1() \
+ \
+ IRQ_ENTER(); \
+ LOCK(A); \
+ UNLOCK(A); \
+ IRQ_EXIT();
+
+#define E2() \
+ \
+ IRQ_DISABLE(); \
+ LOCK(A); \
+ IRQ_ENABLE(); \
+ UNLOCK(A);
+
+/*
+ * Generate 24 testcases:
+ */
+#include "locking-selftest-spin-hardirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_spin)
+
+#include "locking-selftest-rlock-hardirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_rlock)
+
+#include "locking-selftest-wlock-hardirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_hard_wlock)
+
+#include "locking-selftest-spin-softirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_spin)
+
+#include "locking-selftest-rlock-softirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_rlock)
+
+#include "locking-selftest-wlock-softirq.h"
+GENERATE_PERMUTATIONS_2_EVENTS(irqsafe2B_soft_wlock)
+
+#undef E1
+#undef E2
+
+/*
+ * Acquiring a irq-unsafe lock while holding an irq-safe-lock:
+ */
+#define E1() \
+ \
+ LOCK(A); \
+ LOCK(B); \
+ UNLOCK(B); \
+ UNLOCK(A); \
+
+#define E2() \
+ \
+ LOCK(B); \
+ UNLOCK(B);
+
+#define E3() \
+ \
+ IRQ_ENTER(); \
+ LOCK(A); \
+ UNLOCK(A); \
+ IRQ_EXIT();
+
+/*
+ * Generate 36 testcases:
+ */
+#include "locking-selftest-spin-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_spin)
+
+#include "locking-selftest-rlock-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_rlock)
+
+#include "locking-selftest-wlock-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_hard_wlock)
+
+#include "locking-selftest-spin-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_spin)
+
+#include "locking-selftest-rlock-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_rlock)
+
+#include "locking-selftest-wlock-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe3_soft_wlock)
+
+#undef E1
+#undef E2
+#undef E3
+
+/*
+ * If a lock turns into softirq-safe, but earlier it took
+ * a softirq-unsafe lock:
+ */
+
+#define E1() \
+ IRQ_DISABLE(); \
+ LOCK(A); \
+ LOCK(B); \
+ UNLOCK(B); \
+ UNLOCK(A); \
+ IRQ_ENABLE();
+
+#define E2() \
+ LOCK(B); \
+ UNLOCK(B);
+
+#define E3() \
+ IRQ_ENTER(); \
+ LOCK(A); \
+ UNLOCK(A); \
+ IRQ_EXIT();
+
+/*
+ * Generate 36 testcases:
+ */
+#include "locking-selftest-spin-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_spin)
+
+#include "locking-selftest-rlock-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_rlock)
+
+#include "locking-selftest-wlock-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_hard_wlock)
+
+#include "locking-selftest-spin-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_spin)
+
+#include "locking-selftest-rlock-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_rlock)
+
+#include "locking-selftest-wlock-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irqsafe4_soft_wlock)
+
+#undef E1
+#undef E2
+#undef E3
+
+/*
+ * read-lock / write-lock irq inversion.
+ *
+ * Deadlock scenario:
+ *
+ * CPU#1 is at #1, i.e. it has write-locked A, but has not
+ * taken B yet.
+ *
+ * CPU#2 is at #2, i.e. it has locked B.
+ *
+ * Hardirq hits CPU#2 at point #2 and is trying to read-lock A.
+ *
+ * The deadlock occurs because CPU#1 will spin on B, and CPU#2
+ * will spin on A.
+ */
+
+#define E1() \
+ \
+ IRQ_DISABLE(); \
+ WL(A); \
+ LOCK(B); \
+ UNLOCK(B); \
+ WU(A); \
+ IRQ_ENABLE();
+
+#define E2() \
+ \
+ LOCK(B); \
+ UNLOCK(B);
+
+#define E3() \
+ \
+ IRQ_ENTER(); \
+ RL(A); \
+ RU(A); \
+ IRQ_EXIT();
+
+/*
+ * Generate 36 testcases:
+ */
+#include "locking-selftest-spin-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_spin)
+
+#include "locking-selftest-rlock-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_rlock)
+
+#include "locking-selftest-wlock-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_hard_wlock)
+
+#include "locking-selftest-spin-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_spin)
+
+#include "locking-selftest-rlock-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_rlock)
+
+#include "locking-selftest-wlock-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irq_inversion_soft_wlock)
+
+#undef E1
+#undef E2
+#undef E3
+
+/*
+ * read-lock / write-lock recursion that is actually safe.
+ */
+
+#define E1() \
+ \
+ IRQ_DISABLE(); \
+ WL(A); \
+ WU(A); \
+ IRQ_ENABLE();
+
+#define E2() \
+ \
+ RL(A); \
+ RU(A); \
+
+#define E3() \
+ \
+ IRQ_ENTER(); \
+ RL(A); \
+ L(B); \
+ U(B); \
+ RU(A); \
+ IRQ_EXIT();
+
+/*
+ * Generate 12 testcases:
+ */
+#include "locking-selftest-hardirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_hard)
+
+#include "locking-selftest-softirq.h"
+GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion_soft)
+
+#undef E1
+#undef E2
+#undef E3
+
+/*
+ * read-lock / write-lock recursion that is unsafe.
+ */
+
+#define E1() \
+ \
+ IRQ_DISABLE(); \
+ L(B); \
+ WL(A); \
+ WU(A); \
+ U(B); \
+ IRQ_ENABLE();
+
+#define E2() \
+ \
+ RL(A); \
+ RU(A); \
+
+#define E3() \
+ \
+ IRQ_ENTER(); \
+ L(B); \
+ U(B); \
+ IRQ_EXIT();
+
+/*
+ * Generate 12 testcases:
+ */
+#include "locking-selftest-hardirq.h"
+// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_hard)
+
+#include "locking-selftest-softirq.h"
+// GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft)
+
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+# define I_SPINLOCK(x) lockdep_reset_lock(&lock_##x.dep_map)
+# 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)
+#else
+# define I_SPINLOCK(x)
+# define I_RWLOCK(x)
+# define I_MUTEX(x)
+# define I_RWSEM(x)
+#endif
+
+#define I1(x) \
+ do { \
+ I_SPINLOCK(x); \
+ I_RWLOCK(x); \
+ I_MUTEX(x); \
+ I_RWSEM(x); \
+ } while (0)
+
+#define I2(x) \
+ do { \
+ spin_lock_init(&lock_##x); \
+ rwlock_init(&rwlock_##x); \
+ mutex_init(&mutex_##x); \
+ init_rwsem(&rwsem_##x); \
+ } while (0)
+
+static void reset_locks(void)
+{
+ local_irq_disable();
+ I1(A); I1(B); I1(C); I1(D);
+ I1(X1); I1(X2); I1(Y1); I1(Y2); I1(Z1); I1(Z2);
+ lockdep_reset();
+ I2(A); I2(B); I2(C); I2(D);
+ init_shared_classes();
+ local_irq_enable();
+}
+
+#undef I
+
+static int testcase_total;
+static int testcase_successes;
+static int expected_testcase_failures;
+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());
+
+ testcase_fn();
+ /*
+ * 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;
+#endif
+ if (debug_locks != expected) {
+ if (expected_failure) {
+ expected_testcase_failures++;
+ printk("failed|");
+ } else {
+ unexpected_testcase_failures++;
+
+ printk("FAILED|");
+ dump_stack();
+ }
+ } else {
+ testcase_successes++;
+ printk(" ok |");
+ }
+ testcase_total++;
+
+ if (debug_locks_verbose)
+ printk(" lockclass mask: %x, debug_locks: %d, expected: %d\n",
+ lockclass_mask, debug_locks, expected);
+ /*
+ * Some tests (e.g. double-unlock) might corrupt the preemption
+ * count, so restore it:
+ */
+ preempt_count() = saved_preempt_count;
+#ifdef CONFIG_TRACE_IRQFLAGS
+ if (softirq_count())
+ current->softirqs_enabled = 0;
+ else
+ current->softirqs_enabled = 1;
+#endif
+
+ reset_locks();
+}
+
+static inline void print_testname(const char *testname)
+{
+ printk("%33s:", testname);
+}
+
+#define DO_TESTCASE_1(desc, name, nr) \
+ print_testname(desc"/"#nr); \
+ dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
+ printk("\n");
+
+#define DO_TESTCASE_1B(desc, name, nr) \
+ print_testname(desc"/"#nr); \
+ dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK); \
+ printk("\n");
+
+#define DO_TESTCASE_3(desc, name, nr) \
+ print_testname(desc"/"#nr); \
+ dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN); \
+ dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
+ dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
+ printk("\n");
+
+#define DO_TESTCASE_3RW(desc, name, nr) \
+ print_testname(desc"/"#nr); \
+ dotest(name##_spin_##nr, FAILURE, LOCKTYPE_SPIN|LOCKTYPE_RWLOCK);\
+ dotest(name##_wlock_##nr, FAILURE, LOCKTYPE_RWLOCK); \
+ dotest(name##_rlock_##nr, SUCCESS, LOCKTYPE_RWLOCK); \
+ printk("\n");
+
+#define DO_TESTCASE_6(desc, name) \
+ print_testname(desc); \
+ dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
+ dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
+ dotest(name##_rlock, FAILURE, LOCKTYPE_RWLOCK); \
+ dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
+ dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
+ dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
+ printk("\n");
+
+#define DO_TESTCASE_6_SUCCESS(desc, name) \
+ print_testname(desc); \
+ dotest(name##_spin, SUCCESS, LOCKTYPE_SPIN); \
+ dotest(name##_wlock, SUCCESS, LOCKTYPE_RWLOCK); \
+ dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
+ dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX); \
+ dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM); \
+ dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM); \
+ printk("\n");
+
+/*
+ * 'read' variant: rlocks must not trigger.
+ */
+#define DO_TESTCASE_6R(desc, name) \
+ print_testname(desc); \
+ dotest(name##_spin, FAILURE, LOCKTYPE_SPIN); \
+ dotest(name##_wlock, FAILURE, LOCKTYPE_RWLOCK); \
+ dotest(name##_rlock, SUCCESS, LOCKTYPE_RWLOCK); \
+ dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX); \
+ dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM); \
+ dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM); \
+ printk("\n");
+
+#define DO_TESTCASE_2I(desc, name, nr) \
+ DO_TESTCASE_1("hard-"desc, name##_hard, nr); \
+ DO_TESTCASE_1("soft-"desc, name##_soft, nr);
+
+#define DO_TESTCASE_2IB(desc, name, nr) \
+ DO_TESTCASE_1B("hard-"desc, name##_hard, nr); \
+ DO_TESTCASE_1B("soft-"desc, name##_soft, nr);
+
+#define DO_TESTCASE_6I(desc, name, nr) \
+ DO_TESTCASE_3("hard-"desc, name##_hard, nr); \
+ DO_TESTCASE_3("soft-"desc, name##_soft, nr);
+
+#define DO_TESTCASE_6IRW(desc, name, nr) \
+ DO_TESTCASE_3RW("hard-"desc, name##_hard, nr); \
+ DO_TESTCASE_3RW("soft-"desc, name##_soft, nr);
+
+#define DO_TESTCASE_2x3(desc, name) \
+ DO_TESTCASE_3(desc, name, 12); \
+ DO_TESTCASE_3(desc, name, 21);
+
+#define DO_TESTCASE_2x6(desc, name) \
+ DO_TESTCASE_6I(desc, name, 12); \
+ DO_TESTCASE_6I(desc, name, 21);
+
+#define DO_TESTCASE_6x2(desc, name) \
+ DO_TESTCASE_2I(desc, name, 123); \
+ DO_TESTCASE_2I(desc, name, 132); \
+ DO_TESTCASE_2I(desc, name, 213); \
+ DO_TESTCASE_2I(desc, name, 231); \
+ DO_TESTCASE_2I(desc, name, 312); \
+ DO_TESTCASE_2I(desc, name, 321);
+
+#define DO_TESTCASE_6x2B(desc, name) \
+ DO_TESTCASE_2IB(desc, name, 123); \
+ DO_TESTCASE_2IB(desc, name, 132); \
+ DO_TESTCASE_2IB(desc, name, 213); \
+ DO_TESTCASE_2IB(desc, name, 231); \
+ DO_TESTCASE_2IB(desc, name, 312); \
+ DO_TESTCASE_2IB(desc, name, 321);
+
+#define DO_TESTCASE_6x6(desc, name) \
+ DO_TESTCASE_6I(desc, name, 123); \
+ DO_TESTCASE_6I(desc, name, 132); \
+ DO_TESTCASE_6I(desc, name, 213); \
+ DO_TESTCASE_6I(desc, name, 231); \
+ DO_TESTCASE_6I(desc, name, 312); \
+ DO_TESTCASE_6I(desc, name, 321);
+
+#define DO_TESTCASE_6x6RW(desc, name) \
+ DO_TESTCASE_6IRW(desc, name, 123); \
+ DO_TESTCASE_6IRW(desc, name, 132); \
+ DO_TESTCASE_6IRW(desc, name, 213); \
+ DO_TESTCASE_6IRW(desc, name, 231); \
+ DO_TESTCASE_6IRW(desc, name, 312); \
+ DO_TESTCASE_6IRW(desc, name, 321);
+
+
+void locking_selftest(void)
+{
+ /*
+ * Got a locking failure before the selftest ran?
+ */
+ if (!debug_locks) {
+ printk("----------------------------------\n");
+ printk("| Locking API testsuite disabled |\n");
+ printk("----------------------------------\n");
+ return;
+ }
+
+ /*
+ * Run the testsuite:
+ */
+ printk("------------------------\n");
+ printk("| Locking API testsuite:\n");
+ printk("----------------------------------------------------------------------------\n");
+ printk(" | spin |wlock |rlock |mutex | wsem | rsem |\n");
+ printk(" --------------------------------------------------------------------------\n");
+
+ init_shared_classes();
+ debug_locks_silent = !debug_locks_verbose;
+
+ DO_TESTCASE_6R("A-A deadlock", AA);
+ DO_TESTCASE_6R("A-B-B-A deadlock", ABBA);
+ DO_TESTCASE_6R("A-B-B-C-C-A deadlock", ABBCCA);
+ DO_TESTCASE_6R("A-B-C-A-B-C deadlock", ABCABC);
+ DO_TESTCASE_6R("A-B-B-C-C-D-D-A deadlock", ABBCCDDA);
+ DO_TESTCASE_6R("A-B-C-D-B-D-D-A deadlock", ABCDBDDA);
+ DO_TESTCASE_6R("A-B-C-D-B-C-D-A deadlock", ABCDBCDA);
+ DO_TESTCASE_6("double unlock", double_unlock);
+ DO_TESTCASE_6("initialize held", init_held);
+ DO_TESTCASE_6_SUCCESS("bad unlock order", bad_unlock_order);
+
+ printk(" --------------------------------------------------------------------------\n");
+ print_testname("recursive read-lock");
+ printk(" |");
+ dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK);
+ printk(" |");
+ dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM);
+ printk("\n");
+
+ print_testname("recursive read-lock #2");
+ printk(" |");
+ dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK);
+ printk(" |");
+ dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM);
+ printk("\n");
+
+ print_testname("mixed read-write-lock");
+ printk(" |");
+ dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK);
+ printk(" |");
+ dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM);
+ printk("\n");
+
+ print_testname("mixed write-read-lock");
+ printk(" |");
+ dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK);
+ printk(" |");
+ dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM);
+ printk("\n");
+
+ printk(" --------------------------------------------------------------------------\n");
+
+ /*
+ * irq-context testcases:
+ */
+ DO_TESTCASE_2x6("irqs-on + irq-safe-A", irqsafe1);
+ DO_TESTCASE_2x3("sirq-safe-A => hirqs-on", irqsafe2A);
+ DO_TESTCASE_2x6("safe-A + irqs-on", irqsafe2B);
+ DO_TESTCASE_6x6("safe-A + unsafe-B #1", irqsafe3);
+ DO_TESTCASE_6x6("safe-A + unsafe-B #2", irqsafe4);
+ DO_TESTCASE_6x6RW("irq lock-inversion", irq_inversion);
+
+ DO_TESTCASE_6x2("irq read-recursion", irq_read_recursion);
+// DO_TESTCASE_6x2B("irq read-recursion #2", irq_read_recursion2);
+
+ if (unexpected_testcase_failures) {
+ printk("-----------------------------------------------------------------\n");
+ debug_locks = 0;
+ printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n",
+ unexpected_testcase_failures, testcase_total);
+ printk("-----------------------------------------------------------------\n");
+ } else if (expected_testcase_failures && testcase_successes) {
+ printk("--------------------------------------------------------\n");
+ printk("%3d out of %3d testcases failed, as expected. |\n",
+ expected_testcase_failures, testcase_total);
+ printk("----------------------------------------------------\n");
+ debug_locks = 1;
+ } else if (expected_testcase_failures && !testcase_successes) {
+ printk("--------------------------------------------------------\n");
+ printk("All %3d testcases failed, as expected. |\n",
+ expected_testcase_failures);
+ printk("----------------------------------------\n");
+ debug_locks = 1;
+ } else {
+ printk("-------------------------------------------------------\n");
+ printk("Good, all %3d testcases passed! |\n",
+ testcase_successes);
+ printk("---------------------------------\n");
+ debug_locks = 1;
+ }
+ debug_locks_silent = 0;
+}
Index: linux-2.6.24-rc6/lib/Kconfig.debug
===================================================================
--- linux-2.6.24-rc6.orig/lib/Kconfig.debug
+++ linux-2.6.24-rc6/lib/Kconfig.debug
@@ -350,17 +350,6 @@ config DEBUG_SPINLOCK_SLEEP
If you say Y here, various routines which may sleep will become very
noisy if they are called with a spinlock held.
-config DEBUG_LOCKING_API_SELFTESTS
- bool "Locking API boot-time self-tests"
- depends on DEBUG_KERNEL
- help
- Say Y here if you want the kernel to run a short self-test during
- bootup. The self-test checks whether common types of locking bugs
- are detected by debugging mechanisms or not. (if you disable
- lock debugging then those bugs wont be detected of course.)
- The following locking APIs are covered: spinlocks, rwlocks,
- mutexes and rwsems.
-
config STACKTRACE
bool
depends on DEBUG_KERNEL
--
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