locking/selftest: Fix output since KERN_CONT changes

Since the KERN_CONT changes the locking-selftest output is messed up, eg:

  ----------------------------------------------------------------------------
                                   | spin |wlock |rlock |mutex | wsem | rsem |
    --------------------------------------------------------------------------
                       A-A deadlock:
    ok  |
    ok  |
    ok  |
    ok  |
    ok  |
    ok  |

Use pr_cont() to get it looking normal again:

  ----------------------------------------------------------------------------
                                   | spin |wlock |rlock |mutex | wsem | rsem |
    --------------------------------------------------------------------------
                       A-A deadlock:  ok  |  ok  |  ok  |  ok  |  ok  |  ok  |

Reported-by: Christian Kujau <lists@nerdbynature.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linuxppc-dev@ozlabs.org
Link: http://lkml.kernel.org/r/1480027528-934-1-git-send-email-mpe@ellerman.id.au
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 872a15a..f3a217e 100644 (file)
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -980,23 +980,23 @@ static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask)
 #ifndef CONFIG_PROVE_LOCKING
        if (expected == FAILURE && debug_locks) {
                expected_testcase_failures++;
-               printk("failed|");
+               pr_cont("failed|");
        }
        else
 #endif
        if (debug_locks != expected) {
                unexpected_testcase_failures++;
-               printk("FAILED|");
+               pr_cont("FAILED|");
 
                dump_stack();
        } else {
                testcase_successes++;
-               printk("  ok  |");
+               pr_cont("  ok  |");
        }
        testcase_total++;
 
        if (debug_locks_verbose)
-               printk(" lockclass mask: %x, debug_locks: %d, expected: %d\n",
+               pr_cont(" lockclass mask: %x, debug_locks: %d, expected: %d\n",
                        lockclass_mask, debug_locks, expected);
        /*
         * Some tests (e.g. double-unlock) might corrupt the preemption
@@ -1021,26 +1021,26 @@ static inline void print_testname(const char *testname)
 #define DO_TESTCASE_1(desc, name, nr)                          \
        print_testname(desc"/"#nr);                             \
        dotest(name##_##nr, SUCCESS, LOCKTYPE_RWLOCK);          \
-       printk("\n");
+       pr_cont("\n");
 
 #define DO_TESTCASE_1B(desc, name, nr)                         \
        print_testname(desc"/"#nr);                             \
        dotest(name##_##nr, FAILURE, LOCKTYPE_RWLOCK);          \
-       printk("\n");
+       pr_cont("\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");
+       pr_cont("\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");
+       pr_cont("\n");
 
 #define DO_TESTCASE_6(desc, name)                              \
        print_testname(desc);                                   \
@@ -1050,7 +1050,7 @@ static inline void print_testname(const char *testname)
        dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX);          \
        dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM);           \
        dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM);           \
-       printk("\n");
+       pr_cont("\n");
 
 #define DO_TESTCASE_6_SUCCESS(desc, name)                      \
        print_testname(desc);                                   \
@@ -1060,7 +1060,7 @@ static inline void print_testname(const char *testname)
        dotest(name##_mutex, SUCCESS, LOCKTYPE_MUTEX);          \
        dotest(name##_wsem, SUCCESS, LOCKTYPE_RWSEM);           \
        dotest(name##_rsem, SUCCESS, LOCKTYPE_RWSEM);           \
-       printk("\n");
+       pr_cont("\n");
 
 /*
  * 'read' variant: rlocks must not trigger.
@@ -1073,7 +1073,7 @@ static inline void print_testname(const char *testname)
        dotest(name##_mutex, FAILURE, LOCKTYPE_MUTEX);          \
        dotest(name##_wsem, FAILURE, LOCKTYPE_RWSEM);           \
        dotest(name##_rsem, FAILURE, LOCKTYPE_RWSEM);           \
-       printk("\n");
+       pr_cont("\n");
 
 #define DO_TESTCASE_2I(desc, name, nr)                         \
        DO_TESTCASE_1("hard-"desc, name##_hard, nr);            \
@@ -1726,25 +1726,25 @@ static void ww_tests(void)
        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");
+       pr_cont("\n");
 
        print_testname("ww contexts mixing");
        dotest(ww_test_two_contexts, FAILURE, LOCKTYPE_WW);
        dotest(ww_test_diff_class, FAILURE, LOCKTYPE_WW);
-       printk("\n");
+       pr_cont("\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");
+       pr_cont("\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");
+       pr_cont("\n");
 
        print_testname("EDEADLK handling");
        dotest(ww_test_edeadlk_normal, SUCCESS, LOCKTYPE_WW);
@@ -1757,11 +1757,11 @@ static void ww_tests(void)
        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");
+       pr_cont("\n");
 
        print_testname("spinlock nest unlocked");
        dotest(ww_test_spin_nest_unlocked, FAILURE, LOCKTYPE_WW);
-       printk("\n");
+       pr_cont("\n");
 
        printk("  -----------------------------------------------------\n");
        printk("                                 |block | try  |context|\n");
@@ -1771,25 +1771,25 @@ static void ww_tests(void)
        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");
+       pr_cont("\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");
+       pr_cont("\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");
+       pr_cont("\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");
+       pr_cont("\n");
 }
 
 void locking_selftest(void)
@@ -1829,32 +1829,32 @@ void locking_selftest(void)
 
        printk("  --------------------------------------------------------------------------\n");
        print_testname("recursive read-lock");
-       printk("             |");
+       pr_cont("             |");
        dotest(rlock_AA1, SUCCESS, LOCKTYPE_RWLOCK);
-       printk("             |");
+       pr_cont("             |");
        dotest(rsem_AA1, FAILURE, LOCKTYPE_RWSEM);
-       printk("\n");
+       pr_cont("\n");
 
        print_testname("recursive read-lock #2");
-       printk("             |");
+       pr_cont("             |");
        dotest(rlock_AA1B, SUCCESS, LOCKTYPE_RWLOCK);
-       printk("             |");
+       pr_cont("             |");
        dotest(rsem_AA1B, FAILURE, LOCKTYPE_RWSEM);
-       printk("\n");
+       pr_cont("\n");
 
        print_testname("mixed read-write-lock");
-       printk("             |");
+       pr_cont("             |");
        dotest(rlock_AA2, FAILURE, LOCKTYPE_RWLOCK);
-       printk("             |");
+       pr_cont("             |");
        dotest(rsem_AA2, FAILURE, LOCKTYPE_RWSEM);
-       printk("\n");
+       pr_cont("\n");
 
        print_testname("mixed write-read-lock");
-       printk("             |");
+       pr_cont("             |");
        dotest(rlock_AA3, FAILURE, LOCKTYPE_RWLOCK);
-       printk("             |");
+       pr_cont("             |");
        dotest(rsem_AA3, FAILURE, LOCKTYPE_RWSEM);
-       printk("\n");
+       pr_cont("\n");
 
        printk("  --------------------------------------------------------------------------\n");