Messages in this thread Patch in this message | | | From | Yong Zhang <> | Subject | [PATCH 3/3 -rt] lockdep: selftest: save/restore migrate_disable count | Date | Tue, 17 Apr 2012 15:23:39 +0800 |
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From: Yong Zhang <yong.zhang@windriver.com>
->migrate_disable_atomic will corrupt when doing some case, such as double lock...
->migrate_disable will not be affected for now since we have preempt disabled when doing seft test. Just record it also for safe.
Signed-off-by: Yong Zhang <yong.zhang0@gmail.com> --- Found it when enable CONFIG_SCHED_DEBUG.
lib/locking-selftest.c | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-)
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c index 23b8564..a9cb9e4 100644 --- a/lib/locking-selftest.c +++ b/lib/locking-selftest.c @@ -939,6 +939,12 @@ static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask) { unsigned long saved_preempt_count = preempt_count(); int expected_failure = 0; +#ifdef CONFIG_PREEMPT_RT_FULL + int saved_migrate_disable = current->migrate_disable; +# ifdef CONFIG_SCHED_DEBUG + int saved_migrate_disable_atomic = current->migrate_disable_atomic; +# endif +#endif WARN_ON(irqs_disabled()); @@ -980,6 +986,13 @@ static void dotest(void (*testcase_fn)(void), int expected, int lockclass_mask) * count, so restore it: */ preempt_count() = saved_preempt_count; +#ifdef CONFIG_PREEMPT_RT_FULL + current->migrate_disable = saved_migrate_disable; +# ifdef CONFIG_SCHED_DEBUG + current->migrate_disable_atomic = saved_migrate_disable_atomic; +# endif +#endif + #ifdef CONFIG_TRACE_IRQFLAGS if (softirq_count()) current->softirqs_enabled = 0; -- 1.7.5.4
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