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| author | Peter Zijlstra <peterz@infradead.org> | 2010-03-19 01:37:42 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-05-21 09:37:30 -0700 |
| commit | 1704f47b50b5d9e1b825e43e1baaf2c5897baf03 (patch) | |
| tree | 60617ff867624f915f75a502f2207de5e586757a /kernel/lockdep.c | |
| parent | 3142788b7967ccfd2f1813ee9e11aeb1e1cf7de2 (diff) | |
| download | lwn-1704f47b50b5d9e1b825e43e1baaf2c5897baf03.tar.gz lwn-1704f47b50b5d9e1b825e43e1baaf2c5897baf03.zip | |
lockdep: Add novalidate class for dev->mutex conversion
The conversion of device->sem to device->mutex resulted in lockdep
warnings. Create a novalidate class for now until the driver folks
come up with separate classes. That way we have at least the basic
mutex debugging coverage.
Add a checkpatch error so the usage is reserved for device->mutex.
[ tglx: checkpatch and compile fix for LOCKDEP=n ]
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'kernel/lockdep.c')
| -rw-r--r-- | kernel/lockdep.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c index ec21304856d1..54286798c37b 100644 --- a/kernel/lockdep.c +++ b/kernel/lockdep.c @@ -2711,6 +2711,8 @@ void lockdep_init_map(struct lockdep_map *lock, const char *name, } EXPORT_SYMBOL_GPL(lockdep_init_map); +struct lock_class_key __lockdep_no_validate__; + /* * This gets called for every mutex_lock*()/spin_lock*() operation. * We maintain the dependency maps and validate the locking attempt: @@ -2745,6 +2747,9 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass, return 0; } + if (lock->key == &__lockdep_no_validate__) + check = 1; + if (!subclass) class = lock->class_cache; /* |