Re: question on spinlocks

From: Thunder from the hill (thunder@lightweight.ods.org)
Date: Sun Sep 01 2002 - 16:53:53 EST

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Hi,

On Sun, 1 Sep 2002, Ralf Baechle wrote:
> On Sun, Sep 01, 2002 at 07:27:53PM +0200, Oliver Neukum wrote:
> > is the following sequence legal ?
> >
> > spin_lock_irqsave(...);
> > ...
> > spin_unlock(...);
> > schedule();
> > spin_lock(...);
> > ...
> > spin_unlock_irqrestore(...);
>
> 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.

Thunder

-- --./../...-/. -.--/---/..-/.-./..././.-../..-. .---/..-/.../- .- --/../-./..-/-/./--..-- ../.----./.-../.-.. --./../...-/. -.--/---/..- .- -/---/--/---/.-./.-./---/.--/.-.-.- --./.-/-.../.-./.././.-../.-.-.-

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