Messages in this thread |  | | From | Oliver Neukum <> | Subject | Re: question on spinlocks | Date | Mon, 2 Sep 2002 00:33:23 +0200 |
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Am Montag, 2. September 2002 00:09 schrieb Thunder from the hill: > Hi, > > On Mon, 2 Sep 2002, Oliver Neukum wrote: > > > > No; spin_lock_irqsave/spin_unlock_irqrestore and > > > > spin_lock/spin_unlock have to be used in matching pairs. > > > > > > If it was his least problem! He'll run straight into a "schedule > > > w/IRQs disabled" bug. > > > > OK, how do I drop an irqsave spinlock if I don't have flags? > > IMHO you might even ask "How do I start a car when I don't have the > keys?"
Break off the lock, touch some cables ... ;-)
> You might find a way, but it's not desired. Are you sure you want to > reschedule in an interrupt handler? If it's none, are you sure you want > to disable interrupts?
I am not in an interrupt handler. It's not my fault that the scsi layer calls queuecommand with a spinlock held. But I need to sleep, I have to get rid of that spinlock's effects. If possible I even want interrupts to be enabled.
Regards Oliver
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