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SubjectRe: question on spinlocks
On Sun, 2002-09-01 at 18:02, 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?

See my previous message.

Do not do what you are trying to do. Dropping a lock and calling
schedule is fine. Ditto with the interrupt part.

But note:

- interrupts will be reenabled when you reschedule and still
enabled when your task is finally running again.

- Since interrupts are going to magically restore, if you are
worried about the state of interrupts previous to your
function... you have a problem.


Robert Love

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