Messages in this thread | | | Date | Tue, 6 Mar 2001 15:53:45 -0800 (PST) | From | Nigel Gamble <> | Subject | Re: spinlock help |
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On Tue, 6 Mar 2001, Manoj Sontakke wrote: > 1. when spin_lock_irqsave() function is called the subsequent code is > executed untill spin_unloc_irqrestore()is called. is this right?
Yes. The protected code will not be interrupted, or simultaneously executed by another CPU.
> 2. is this sequence valid? > spin_lock_irqsave(a,b); > spin_lock_irqsave(c,d);
Yes, as long as it is followed by:
spin_unlock_irqrestore(c, d); spin_unlock_irqrestore(a, b);
Nigel Gamble nigel@nrg.org Mountain View, CA, USA. http://www.nrg.org/
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