Messages in this thread | | | From | Sven Eckelmann <> | Subject | Using nested locking for spin_lock_bh | Date | Wed, 28 Mar 2012 18:36:39 +0200 |
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Hi,
I started to run some experimental batman-adv code inside some virtual machines with different debugging functions enabled. One of them was lockdep. There we noticed a false positive for a lock class that is actually used in two different data structures. Therefore, lockdep noticed that there could be a deadlock for this class in a function that locks the two different data structures.
To resolve this problem, I wanted to define two different subclasses and replace the spin_lock_bh with its nested version. The only problem now is the absence of spin_lock_bh_nested. I could only find spin_lock_bh and spin_lock_irqsave_nested.
Is there another way how this should be done or is there a general problem why there is no nested support for this incarnation of spin_lock?
Kind regards, Sven[unhandled content-type:application/pgp-signature] | |