On (08/04/11 17:47), Peter Zijlstra wrote:
> On Thu, 2011-08-04 at 18:37 +0300, Sergey Senozhatsky wrote:
> > > > [ 132.794685] WARNING: at kernel/lockdep.c:3117 match_held_lock+0xf6/0x12e()
>
> Just to double check, that line is:
>
> if (DEBUG_LOCKS_WARN_ON(!hlock->nest_lock))
>
> in your kernel source?
>
Nope, that's `if (DEBUG_LOCKS_WARN_ON(!class))'
3106 static int match_held_lock(struct held_lock *hlock, struct lockdep_map *lock)
3107 {
3108 if (hlock->instance == lock)
3109 return 1;
3110
3111 if (hlock->references) {
3112 struct lock_class *class = lock->class_cache[0];
3113
3114 if (!class)
3115 class = look_up_lock_class(lock, 0);
3116
3117 if (DEBUG_LOCKS_WARN_ON(!class))
3118 return 0;
3119
3120 if (DEBUG_LOCKS_WARN_ON(!hlock->nest_lock))
3121 return 0;
3122
3123 if (hlock->class_idx == class - lock_classes + 1)
3124 return 1;
3125 }
3126
3127 return 0;
3128 }
3129
Sergey
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