On 05/27/2015 08:32 PM, NeilBrown wrote:
Hi Keith,
I'm getting lockdep warning around use of ext_devt_lock.
[11428.266019] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
As you say in
2da78092dda1 ("block: Fix dev_t minor allocation lifetime")
ext_devt_lock can be taken from call_rcu's soft-irq.
I think that means it should always use the _irq verion of spinlock.
Wouldn't spin_lock_bh() and friends suffice then?
--
Jens Axboe
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