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authorPeter Zijlstra <peterz@infradead.org>2010-03-19 03:37:42 +0300
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-21 20:37:30 +0400
commit1704f47b50b5d9e1b825e43e1baaf2c5897baf03 (patch)
tree60617ff867624f915f75a502f2207de5e586757a /include
parent3142788b7967ccfd2f1813ee9e11aeb1e1cf7de2 (diff)
downloadlinux-1704f47b50b5d9e1b825e43e1baaf2c5897baf03.tar.xz
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 'include')
-rw-r--r--include/linux/lockdep.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index a03977a96d7e..06aed8305bf3 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -44,6 +44,8 @@ struct lock_class_key {
struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES];
};
+extern struct lock_class_key __lockdep_no_validate__;
+
#define LOCKSTAT_POINTS 4
/*
@@ -270,6 +272,9 @@ extern void lockdep_init_map(struct lockdep_map *lock, const char *name,
#define lockdep_set_subclass(lock, sub) \
lockdep_init_map(&(lock)->dep_map, #lock, \
(lock)->dep_map.key, sub)
+
+#define lockdep_set_novalidate_class(lock) \
+ lockdep_set_class(lock, &__lockdep_no_validate__)
/*
* Compare locking classes
*/
@@ -354,6 +359,9 @@ static inline void lockdep_on(void)
#define lockdep_set_class_and_subclass(lock, key, sub) \
do { (void)(key); } while (0)
#define lockdep_set_subclass(lock, sub) do { } while (0)
+
+#define lockdep_set_novalidate_class(lock) do { } while (0)
+
/*
* We don't define lockdep_match_class() and lockdep_match_key() for !LOCKDEP
* case since the result is not well defined and the caller should rather